<SEC-DOCUMENT>0001144204-16-076135.txt : 20160120
<SEC-HEADER>0001144204-16-076135.hdr.sgml : 20160120
<ACCEPTANCE-DATETIME>20160119174628
ACCESSION NUMBER:		0001144204-16-076135
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20160120
DATE AS OF CHANGE:		20160119
GROUP MEMBERS:		MERCURY FUND, XI, LTD.
GROUP MEMBERS:		MERCURY MANAGEMENT, LLC.
GROUP MEMBERS:		MERCURY VENTURES III, LTD.

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DATA I/O CORP
		CENTRAL INDEX KEY:			0000351998
		STANDARD INDUSTRIAL CLASSIFICATION:	INSTRUMENTS FOR MEAS & TESTING OF ELECTRICITY & ELEC SIGNALS [3825]
		IRS NUMBER:				910864123
		STATE OF INCORPORATION:			WA
		FISCAL YEAR END:			1211

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-33828
		FILM NUMBER:		161349254

	BUSINESS ADDRESS:	
		STREET 1:		6464 185TH AVE NE, SUITE 101
		CITY:			REDMOND
		STATE:			WA
		ZIP:			98052
		BUSINESS PHONE:		4258676922

	MAIL ADDRESS:	
		STREET 1:		6464 185TH AVE NE, SUITE 101
		CITY:			REDMOND
		STATE:			WA
		ZIP:			98052

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			HOWE KEVIN C
		CENTRAL INDEX KEY:			0001209253

	FILING VALUES:
		FORM TYPE:		SC 13G/A
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>v429225_sc13ga.htm
<DESCRIPTION>SCHEDULE 13G/A
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="margin-top: 0; text-align: center; margin-bottom: 0">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">SECURITIES AND
EXCHANGE COMMISSION</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">WASHINGTON,
DC 20549</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">&nbsp;</P>

<P STYLE="font: bold 12pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><FONT STYLE="font-size: 12pt">Schedule
</FONT>13G/A</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">(Rule 13d-102)</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">INFORMATION
TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">RULES 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">PURSUANT TO
RULE 13d-2(b)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>Under the Securities
Exchange Act of 1934</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>(Amendment No.
1)*</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><FONT STYLE="font-size: 12pt">DATA
I/O CORPORATION</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">(Name of Issuer)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">Common Stock</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">(Title of Class of
Securities)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">237690102</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">(CUSIP Number)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>December 31, 2015</B><BR>
<FONT STYLE="font-size: 10pt">(Date of Event Which Requires Filing of this Statement)</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">Check the appropriate
box to designate the rule pursuant to which this Schedule is filed:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.25in; text-align: left"><FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD><TD STYLE="text-align: justify">Rule
                                         13d-1(b)</TD>
</TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.25in; text-align: left"><FONT STYLE="font: 10pt Wingdings">x</FONT></TD><TD STYLE="text-align: justify">Rule
                                         13d-1(c)</TD>
</TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.25in; text-align: left"><FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD><TD STYLE="text-align: justify">Rule
                                         13d-1(d)</TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">*The remainder of
this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover
page.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">The information required
in the remainder of this cover page shall not be deemed to be &ldquo;filed&rdquo; for the purpose of Section 18 of the Securities
Exchange Act of 1934, as amended (&ldquo;Act&rdquo;), or otherwise subject to the liabilities of that section of the Act but shall
be subject to all other provisions of the Act.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

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<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%; font-size: 10pt">CUSIP No. 237690102</TD>
    <TD STYLE="width: 50%; font-size: 10pt; text-align: right">Page 2 of 10</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 7%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">1.</TD>
    <TD STYLE="width: 78%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Name of Reporting
    Person</TD>
    <TD STYLE="width: 15%; font-weight: normal; text-align: justify; layout-grid-mode: line; padding-right: 0.3in">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: center; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="font-weight: normal; text-align: left; text-indent: 0in; layout-grid-mode: line">I. R. S. Identification No. of
    Above Person (entities only)</TD>
    <TD STYLE="font-weight: normal; text-align: center; layout-grid-mode: line; padding-right: 0.3in">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 0.3in">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid; padding-bottom: 4pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-bottom: 4pt">Mercury Fund XI, Ltd.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;I.R.S.
    Identification No. 80-0912589</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 0.3in; padding-bottom: 4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 0.3in">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">2.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Check the Appropriate Box if
    a Member of a Group*</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in">(a) <FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">&nbsp;</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">&nbsp;</TD>
    <TD STYLE="font-weight: normal; text-align: right; border-bottom: Black 1pt solid; layout-grid-mode: line; padding-right: 0.3in; padding-top: 3pt; padding-bottom: 6pt">(b)
    <FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; padding-top: 3pt; padding-bottom: 6pt; border-bottom: Black 1pt solid">3.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; padding-top: 3pt; padding-bottom: 6pt; border-bottom: Black 1pt solid">SEC
    Use Only</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; padding-top: 3pt; padding-bottom: 6pt; border-bottom: Black 1pt solid">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">4.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Citizenship
    or Place of Organization</TD>
    <TD STYLE="font-weight: normal; text-align: right; border-bottom: Black 1pt solid; layout-grid-mode: line; padding-right: 0.3in; padding-top: 3pt; padding-bottom: 6pt">Texas</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 15%; padding-top: 6pt">Number of</TD>
    <TD STYLE="width: 7%; padding-top: 6pt">5.</TD>
    <TD STYLE="width: 66%; padding-top: 6pt">Sole Voting Power</TD>
    <TD STYLE="width: 12%; padding-top: 6pt">440,187<SUP>(1)</SUP></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Shares</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Beneficially</TD>
    <TD>6.</TD>
    <TD>Shared Voting Power</TD>
    <TD>-0-</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Owned by</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Each</TD>
    <TD>7.</TD>
    <TD>Sole Dispositive Power</TD>
    <TD>440,187<SUP> (1)</SUP></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Reporting</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Person With</TD>
    <TD>8.</TD>
    <TD>Shared Dispositive Power</TD>
    <TD>-0-</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid">&nbsp;</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0in"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 7%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">9.</TD>
    <TD STYLE="width: 78%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Aggregate
    Amount Beneficially Owned by Each Reporting Person</TD>
    <TD STYLE="width: 15%; font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">440,187(1)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">10.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Check
    Box if the Aggregate Amount in Row (9) Excludes Certain Shares*</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt"><FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">11.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Percent
    of Class Represented by Amount in Row (9)</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">5.54%<SUP>(2)</SUP></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">12.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Type
    of Reporting Person*</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">PN</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><SUP>(1)</SUP></TD><TD STYLE="text-align: justify">Mr. Howe exercises voting and disposition power over such shares on behalf of Mercury Management, L.L.C. (&ldquo;Mercury Management&rdquo;),
the General Partner of Mercury Ventures III, Ltd. (&ldquo;Mercury Ventures III&rdquo;), which is the General Partner of Mercury Fund XI,
Ltd. (&ldquo;Mercury XI&rdquo;).</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"><SUP>&nbsp;</SUP></P>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><SUP>(2)</SUP></TD><TD STYLE="text-align: justify">Assumes a total of 7,943,720 shares of Common Stock outstanding based on the Data I/O Quarterly Report on Form 10-Q for the
fiscal quarter ended September 30, 2015 filed on November 12, 2015.</TD></TR></TABLE>



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    <TD STYLE="width: 50%; font-size: 10pt">CUSIP No. 237690102</TD>
    <TD STYLE="width: 50%; font-size: 10pt; text-align: right">Page 3 of 10</TD></TR>
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<TR STYLE="vertical-align: top">
    <TD STYLE="width: 7%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">1.</TD>
    <TD STYLE="width: 78%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Name of Reporting
    Person</TD>
    <TD STYLE="width: 15%; font-weight: normal; text-align: justify; layout-grid-mode: line; padding-right: 0.3in">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: center; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="font-weight: normal; text-align: left; text-indent: 0in; layout-grid-mode: line">I. R. S. Identification No. of
    Above Person (entities only)</TD>
    <TD STYLE="font-weight: normal; text-align: center; layout-grid-mode: line; padding-right: 0.3in">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 0.3in">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid; padding-bottom: 4pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-bottom: 4pt">Mercury Ventures III, Ltd.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;I.R.S.
    Identification No. 46-2489415</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 0.3in; padding-bottom: 4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 0.3in">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">2.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Check the Appropriate Box if
    a Member of a Group*</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in">(a) <FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">&nbsp;</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">&nbsp;</TD>
    <TD STYLE="font-weight: normal; text-align: right; border-bottom: Black 1pt solid; layout-grid-mode: line; padding-right: 0.3in; padding-top: 3pt; padding-bottom: 6pt">(b)
    <FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; padding-top: 3pt; padding-bottom: 6pt; border-bottom: Black 1pt solid">3.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; padding-top: 3pt; padding-bottom: 6pt; border-bottom: Black 1pt solid">SEC
    Use Only</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; padding-top: 3pt; padding-bottom: 6pt; border-bottom: Black 1pt solid">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">4.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Citizenship
    or Place of Organization</TD>
    <TD STYLE="font-weight: normal; text-align: right; border-bottom: Black 1pt solid; layout-grid-mode: line; padding-right: 0.3in; padding-top: 3pt; padding-bottom: 6pt">Texas</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 15%; padding-top: 6pt">Number of</TD>
    <TD STYLE="width: 7%; padding-top: 6pt">5.</TD>
    <TD STYLE="width: 66%; padding-top: 6pt">Sole Voting Power</TD>
    <TD STYLE="width: 12%; padding-top: 6pt">440,187<SUP>(1)</SUP></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Shares</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Beneficially</TD>
    <TD>6.</TD>
    <TD>Shared Voting Power</TD>
    <TD>-0-</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Owned by</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Each</TD>
    <TD>7.</TD>
    <TD>Sole Dispositive Power</TD>
    <TD>440,187<SUP>(1)</SUP></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Reporting</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Person With</TD>
    <TD>8.</TD>
    <TD>Shared Dispositive Power</TD>
    <TD>-0-</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid">&nbsp;</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0in"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 7%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">9.</TD>
    <TD STYLE="width: 78%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Aggregate
    Amount Beneficially Owned by Each Reporting Person</TD>
    <TD STYLE="width: 15%; font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">440,187<SUP>(1)</SUP></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">10.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Check
    Box if the Aggregate Amount in Row (9) Excludes Certain Shares*</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt"><FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">11.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Percent
    of Class Represented by Amount in Row (9)</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">5.54%<SUP>(2)</SUP></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">12.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Type
    of Reporting Person*</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">PN</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><SUP>(1)</SUP></TD><TD STYLE="text-align: justify">Mr. Howe exercises voting and disposition power over such shares on behalf of Mercury Management, the General Partner of Mercury
Ventures III, which is the General Partner of Mercury Fund XI, which owns 440,187 shares of common stock (&ldquo;Common Stock&rdquo;)
of Data I/O Corp. (&ldquo;Data I/O&rdquo;).</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><SUP>(2)</SUP></TD><TD STYLE="text-align: justify">Assumes a total of 7,943,720 shares of Common Stock outstanding based on the Data I/O Quarterly Report on Form 10-Q for the
fiscal quarter ended September 30, 2015 filed on November 12, 2015.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<P STYLE="margin: 0"></P>

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<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%; font-size: 10pt">CUSIP No. 237690102</TD>
    <TD STYLE="width: 50%; font-size: 10pt; text-align: right">Page 4 of 10</TD></TR>
</TABLE>
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<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 7%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">1.</TD>
    <TD STYLE="width: 78%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Name of Reporting
    Person</TD>
    <TD STYLE="width: 15%; font-weight: normal; text-align: justify; layout-grid-mode: line; padding-right: 0.3in">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: center; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="font-weight: normal; text-align: left; text-indent: 0in; layout-grid-mode: line">I. R. S. Identification No. of
    Above Person (entities only)</TD>
    <TD STYLE="font-weight: normal; text-align: center; layout-grid-mode: line; padding-right: 0.3in">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 0.3in">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid; padding-bottom: 4pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-bottom: 4pt"><P STYLE="margin: 0pt 0">Mercury Management, L.L.C.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;I.R.S.
                                         Identification No. 75-2796232</P>


</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 0.3in; padding-bottom: 4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 0.3in">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">2.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Check the Appropriate Box if
    a Member of a Group*</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in">(a) <FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">&nbsp;</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">&nbsp;</TD>
    <TD STYLE="font-weight: normal; text-align: right; border-bottom: Black 1pt solid; layout-grid-mode: line; padding-right: 0.3in; padding-top: 3pt; padding-bottom: 6pt">(b)
    <FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; padding-top: 3pt; padding-bottom: 6pt; border-bottom: Black 1pt solid">3.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; padding-top: 3pt; padding-bottom: 6pt; border-bottom: Black 1pt solid">SEC
    Use Only</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; padding-top: 3pt; padding-bottom: 6pt; border-bottom: Black 1pt solid">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">4.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Citizenship
    or Place of Organization</TD>
    <TD STYLE="font-weight: normal; text-align: right; border-bottom: Black 1pt solid; layout-grid-mode: line; padding-right: 0.3in; padding-top: 3pt; padding-bottom: 6pt">Texas</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 15%; padding-top: 6pt">Number of</TD>
    <TD STYLE="width: 7%; padding-top: 6pt">5.</TD>
    <TD STYLE="width: 66%; padding-top: 6pt">Sole Voting Power</TD>
    <TD STYLE="width: 12%; padding-top: 6pt">440,187 <SUP>(1)</SUP></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Shares</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Beneficially</TD>
    <TD>6.</TD>
    <TD>Shared Voting Power</TD>
    <TD>-0-</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Owned by</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Each</TD>
    <TD>7.</TD>
    <TD>Sole Dispositive Power</TD>
    <TD>440,187 <SUP>(1)</SUP></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Reporting</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Person With</TD>
    <TD>8.</TD>
    <TD>Shared Dispositive Power</TD>
    <TD>-0-</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid">&nbsp;</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0in"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 7%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">9.</TD>
    <TD STYLE="width: 78%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Aggregate
    Amount Beneficially Owned by Each Reporting Person</TD>
    <TD STYLE="width: 15%; font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">440,187(1)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">10.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Check
    Box if the Aggregate Amount in Row (9) Excludes Certain Shares*</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt"><FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">11.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Percent
    of Class Represented by Amount in Row (9)</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">5.54%<SUP>(2)</SUP></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">12.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Type
    of Reporting Person*</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">OO</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><SUP>(1)</SUP></TD><TD STYLE="text-align: justify">Mr. Howe exercises voting and disposition power over such shares on behalf of Mercury Management, the General Partner of Mercury
Ventures III, which is the General Partner of Mercury XI, which owns 440,187 shares of Common Stock.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"><SUP>&nbsp;</SUP></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font-size: 10pt; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 0.25in; text-align: left"><SUP>(2)</SUP></TD><TD STYLE="text-align: justify">Assumes a total of 7,943,720 shares of Common Stock outstanding based on the Data I/O Quarterly Report on Form 10-Q for the
fiscal quarter ended September 30, 2015 filed on November 12, 2015.</TD>
</TR></TABLE>



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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in">&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"></P>

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    <TD STYLE="width: 50%; font-size: 10pt">CUSIP No. 237690102</TD>
    <TD STYLE="width: 50%; font-size: 10pt; text-align: right">Page 5 of 10</TD></TR>
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<TR STYLE="vertical-align: top">
    <TD STYLE="width: 7%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">1.</TD>
    <TD STYLE="width: 75%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Name of Reporting
    Person</TD>
    <TD STYLE="width: 18%; font-weight: normal; text-align: justify; layout-grid-mode: line; padding-right: 0.3in">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: center; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="font-weight: normal; text-align: left; text-indent: 0in; layout-grid-mode: line">I. R. S. Identification No. of
    Above Person (entities only)</TD>
    <TD STYLE="font-weight: normal; text-align: center; layout-grid-mode: line; padding-right: 0.3in">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 0.3in">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid; padding-bottom: 4pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-bottom: 4pt"><P STYLE="margin: 0pt 0">Kevin C. Howe</P>


</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 0.3in; padding-bottom: 4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 0.3in">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">2.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Check the Appropriate Box if
    a Member of a Group*</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in">(a) <FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">&nbsp;</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">&nbsp;</TD>
    <TD STYLE="font-weight: normal; text-align: right; border-bottom: Black 1pt solid; layout-grid-mode: line; padding-right: 0.3in; padding-top: 3pt; padding-bottom: 6pt">(b)
    <FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; padding-top: 3pt; padding-bottom: 6pt; border-bottom: Black 1pt solid">3.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; padding-top: 3pt; padding-bottom: 6pt; border-bottom: Black 1pt solid">SEC
    Use Only</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; padding-top: 3pt; padding-bottom: 6pt; border-bottom: Black 1pt solid">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">4.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Citizenship
    or Place of Organization</TD>
    <TD STYLE="font-weight: normal; text-align: right; border-bottom: Black 1pt solid; layout-grid-mode: line; padding-right: 0.3in; padding-top: 3pt; padding-bottom: 6pt"><P STYLE="margin: 0pt 0">United
                                         States</P>


</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 15%; padding-top: 6pt">Number of</TD>
    <TD STYLE="width: 7%; padding-top: 6pt">5.</TD>
    <TD STYLE="width: 66%; padding-top: 6pt">Sole Voting Power</TD>
    <TD STYLE="width: 12%; padding-top: 6pt">440,187 <SUP>(1)</SUP></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Shares</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Beneficially</TD>
    <TD>6.</TD>
    <TD>Shared Voting Power</TD>
    <TD>-0-</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Owned by</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Each</TD>
    <TD>7.</TD>
    <TD>Sole Dispositive Power</TD>
    <TD>440,187 <SUP>(1)</SUP></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Reporting</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>Person With</TD>
    <TD>8.</TD>
    <TD>Shared Dispositive Power</TD>
    <TD>-0-</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid">&nbsp;</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0in"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 7%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">9.</TD>
    <TD STYLE="width: 78%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Aggregate
    Amount Beneficially Owned by Each Reporting Person</TD>
    <TD STYLE="width: 15%; font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">440,187
    (1)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">10.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Check
    Box if the Aggregate Amount in Row (9) Excludes Certain Shares*</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt"><FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">11.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Percent
    of Class Represented by Amount in Row (9)</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">5.54%<SUP>(2)</SUP></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">12.</TD>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">Type
    of Reporting Person*</TD>
    <TD STYLE="font-weight: normal; text-align: right; layout-grid-mode: line; padding-right: 0.3in; border-bottom: Black 1pt solid; padding-top: 3pt; padding-bottom: 6pt">IN</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><SUP>(1)</SUP></TD><TD STYLE="text-align: justify">Mr. Howe exercises voting and disposition power over such shares on behalf of Mercury Management, the General Partner of Mercury
Ventures III, which is the General Partner of Mercury XI, which owns 440,187 shares of Common Stock.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"><SUP>&nbsp;</SUP></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font-size: 10pt; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 0.25in; text-align: left"><SUP>(2)</SUP></TD><TD STYLE="text-align: justify">Assumes a total of 7,943,720 shares of Common Stock outstanding based on the Data I/O Quarterly Report on Form 10-Q for the
fiscal quarter ended September 30, 2015 filed on November 12, 2015.</TD>
</TR></TABLE>



<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"></P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><U>*SEE INSTRUCTIONS BEFORE FILLING
OUT!</U></P>



<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in">&nbsp;&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%; font-size: 10pt">CUSIP No. 237690102</TD>
    <TD STYLE="width: 50%; font-size: 10pt; text-align: right">Page 6 of 10</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><U>Introduction</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">Pursuant to Rule 13d-1(k)(1)
of the Securities Exchange Act of 1934, as amended, Mercury Fund XI, Ltd. ("Mercury XI"), Mercury Ventures III, Ltd. ("Mercury
Ventures III"), Mercury Management, L.L.C. ("Mercury Management") and Kevin C. Howe ("Mr. Howe") are making this joint filing
on Schedule 13G/A.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 1in; text-align: left">Item 1(a).</TD><TD STYLE="text-align: justify">Name of Issuer:</TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">Data I/O Corporation, a Delaware corporation (&ldquo;Data
I/O&rdquo;)</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-indent: -1in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 1in; text-align: left">Item 1(b).</TD><TD STYLE="text-align: justify">Address of
                                         Issuer's Principal Executive Offices:</TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">6464 185<SUP>th</SUP> Avenue NE, Suite 101, Redmond,
WA 98052</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-indent: -1in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 1in; text-align: left">Item 2(a).</TD><TD STYLE="text-align: justify">Name of Person
                                         Filing:</TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">Mercury Fund XI, Ltd.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">Mercury Ventures III, Ltd.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">Mercury Management, L.L.C.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">Kevin C. Howe</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-indent: -1in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 1in; text-align: left">Item 2(b).</TD><TD STYLE="text-align: justify">Address of
                                         Principal Business Office or, if None, Residence:</TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">The principal business office of Mercury Fund XI, Ltd.,
Mercury Ventures III, Mercury Management and Mr. Howe is 501 Park Lake Drive, McKinney, Texas 75070.</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-indent: -1in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 1in; text-align: left">Item 2(c).</TD><TD STYLE="text-align: justify">Citizenship:</TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 2in; text-indent: -1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 2in; text-indent: -1in">Mercury XI's place of organization
is Texas</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 2in; text-indent: -1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 2in; text-indent: -1in">Mercury Ventures III's place of
organization is Texas</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 2in; text-indent: -1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 2in; text-indent: -1in">Mercury Management's place of organization
is Texas</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 2in; text-indent: -1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 2in; text-indent: -1in">Mr. Howe is a citizen of the United
States</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 1in; text-align: left">Item 2(d).</TD><TD STYLE="text-align: justify">Title of Class
                                         of Securities:</TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">Common stock, $0.01 par value per share (the &ldquo;Common Stock&rdquo;)</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-indent: -1in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-indent: -1in"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 1in; text-align: left">Item 2(e).</TD><TD STYLE="text-align: justify">CUSIP Number:</TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 2in; text-indent: -1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 2in; text-indent: -1in">237690102</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 2in; text-indent: -1in">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 2in; text-indent: -1in">&nbsp;&nbsp;</P>

<table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<tr style="vertical-align: top">
    <td style="width: 50%; font-size: 10pt">CUSIP No. 237690102</td>
    <td style="width: 50%; font-size: 10pt; text-align: right">Page 7 of 10</td></tr>
</table>
<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-indent: -1in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 1in; text-align: left">Item 3.</TD><TD STYLE="text-align: justify">If this statement
                                         is filed pursuant to Rules 13d-1(b), or 13d-2(b) or (c), check whether the person filing
                                         is a:</TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 2in; text-indent: -1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 2in; text-indent: -1in">Not Applicable.</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-indent: -1in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 1in; text-align: left">Item 4.</TD><TD STYLE="text-align: justify">Ownership:</TD>
</TR></TABLE>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-indent: -1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><U>Mercury XI</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 85%; border-collapse: collapse; margin-left: 1in">
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(a)</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Amount beneficially
    owned:</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">440,187<SUP>(1)</SUP></td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(b)</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Percent of class:</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">5.54%<SUP>(2)</SUP></td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(c)</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Number of shares
    as to which the person has:</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD>&nbsp;</td>
    <td colspan="2">&nbsp;</td>
    <TD STYLE="text-align: right">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="width: 5%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="width: 5%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(i)</td>
    <TD STYLE="width: 70%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Sole power to vote
    or direct the vote</td>
    <TD STYLE="width: 20%; font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">440,187<SUP>(1)</SUP></td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(ii)</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Shared power to vote or direct
    the vote</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">-0-</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(iii)</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Sole power to dispose or to
    direct the disposition of</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">440,187<SUP>(1)</SUP></td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(iv)</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Shared power to dispose or
    to direct the disposition of</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">-0-</td></tr>
</table>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"><SUP>&nbsp;</SUP></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><SUP>(1)</SUP></TD><TD STYLE="text-align: justify">Mr. Howe exercises voting and disposition power over such shares on behalf of Mercury Management, the General Partner of Mercury
Ventures III, which is the General Partner of Mercury XI.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"><SUP>&nbsp;</SUP></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><SUP>(2)</SUP></TD><TD STYLE="text-align: justify">Assumes a total of 7,943,720 shares of Common Stock outstanding based on the Data I/O Quarterly Report on Form 10-Q for the
fiscal quarter ended September 30, 2015 filed on November 12, 2015.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><U>Mercury Ventures III</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 85%; border-collapse: collapse; margin-left: 1in">
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(a)</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Amount beneficially
    owned:</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">440,187<SUP> (1)</SUP></td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(b)</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Percent of class:</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">5.54%<SUP>(2)</SUP></td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(c)</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Number of shares
    as to which the person has:</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD>&nbsp;</td>
    <td colspan="2">&nbsp;</td>
    <TD STYLE="text-align: right">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="width: 5%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="width: 5%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(i)</td>
    <TD STYLE="width: 70%; font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Sole power to vote
    or direct the vote</td>
    <TD STYLE="width: 20%; font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">440,187<SUP> (1)</SUP></td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(ii)</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Shared power to vote or direct
    the vote</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">-0-</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(iii)</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Sole power to dispose or to
    direct the disposition of</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">440,187<SUP> (1)</SUP></td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(iv)</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Shared power to dispose or
    to direct the disposition of</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">-0-</td></tr>
</table>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"><SUP>&nbsp;</SUP></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><SUP>(1)</SUP></TD><TD STYLE="text-align: justify">Mr. Howe exercises voting and disposition power over such shares on behalf of Mercury Management, the General Partner of Mercury
Ventures III, which is the General Partner of Mercury XI, which owns 440,187 shares of Common Stock.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"><SUP>&nbsp;</SUP></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><SUP>(2)</SUP></TD><TD STYLE="text-align: justify">Assumes a total of 7,943,720 shares of Common Stock outstanding based on the Data I/O Quarterly Report on Form 10-Q for the
fiscal quarter ended September 30, 2015 filed on November 12, 2015.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<tr style="vertical-align: top">
    <td style="width: 50%">CUSIP No. 237690102</td>
    <td style="width: 50%; text-align: right">Page 8 of 10</td></tr>
</table>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><U>Mercury Management</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 85%; border-collapse: collapse; margin-left: 1in">
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(a)</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Amount beneficially
    owned:</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">440,187<SUP> (1)</SUP></td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(b)</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Percent of class:</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">5.54%<SUP>(2)</SUP></td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(c)</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Number of shares
    as to which the person has:</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="width: 5%">&nbsp;</td>
    <TD STYLE="width: 5%">&nbsp;</td>
    <TD STYLE="width: 70%">&nbsp;</td>
    <TD STYLE="width: 20%; text-align: right">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(i)</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Sole power to vote or direct
    the vote</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">440,187<SUP> (1)</SUP></td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(ii)</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Shared power to vote or direct
    the vote</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">-0-</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(iii)</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Sole power to dispose or to
    direct the disposition of</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">440,187<SUP> (1)</SUP></td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(iv)</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Shared power to dispose or
    to direct the disposition of</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">-0-</td></tr>
</table>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"><SUP>&nbsp;</SUP></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><SUP>(1)</SUP></TD><TD STYLE="text-align: justify">Mr. Howe exercises voting and disposition power over such shares on behalf of Mercury Management, the General Partner of Mercury
Ventures III, which is the General Partner of Mercury XI, which owns 440,187 shares of Common Stock.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><SUP>(2)</SUP></TD><TD STYLE="text-align: justify">Assumes a total of 7,943,720 shares of Common Stock outstanding based on the Data I/O Quarterly Report on Form 10-Q for the
fiscal quarter ended September 30, 2015 filed on November 12, 2015.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><U>Mr. Howe</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 85%; border-collapse: collapse; margin-left: 1in">
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(a)</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Amount beneficially
    owned:</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">440,187<SUP> (1)</SUP></td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(b)</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Percent of class:</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">5.54%<SUP>(2)</SUP></td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(c)</td>
    <td colspan="2" style="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Number of shares
    as to which the person has:</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="width: 5%">&nbsp;</td>
    <TD STYLE="width: 5%">&nbsp;</td>
    <TD STYLE="width: 70%">&nbsp;</td>
    <TD STYLE="width: 20%; text-align: right">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(i)</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Sole power to vote or direct
    the vote</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">440,187<SUP> (1)</SUP></td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(ii)</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Shared power to vote or direct
    the vote</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">-0-</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(iii)</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Sole power to dispose or to
    direct the disposition of</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">440,187<SUP> (1)</SUP></td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">(iv)</td>
    <TD STYLE="font-weight: normal; text-align: justify; text-indent: 0in; layout-grid-mode: line">Shared power to dispose or
    to direct the disposition of</td>
    <TD STYLE="font-weight: normal; text-align: right; text-indent: 0in; layout-grid-mode: line">-0-</td></tr>
</table>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in"><SUP>&nbsp;</SUP></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><SUP>(1)</SUP></TD><TD STYLE="text-align: justify">Mr. Howe exercises voting and disposition power over such shares on behalf of Mercury Management, the General Partner of Mercury
Ventures III, which is the General Partner of Mercury XI, which owns 440,187 shares of Common Stock.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><SUP>(2)</SUP></TD><TD STYLE="text-align: justify">Assumes a total of 7,943,720 shares of Common Stock outstanding based on the Data I/O Quarterly Report on Form 10-Q for the
fiscal quarter ended September 30, 2015 filed on November 12, 2015.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 1in; text-align: left"><B>Item 5.</B></TD><TD STYLE="text-align: justify"><B>Ownership
                                         of Five Percent or Less of a Class:</B></TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify">If this statement is being filed
to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent
of the class of securities, check the following. <FONT STYLE="font: 10pt Wingdings">&uml;</FONT></P>



<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify">Not Applicable.</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-indent: -1in">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<tr style="vertical-align: top">
    <td style="width: 50%">CUSIP No. 237690102</td>
    <td style="width: 50%; text-align: right">Page 9 of 10</td></tr>
</table>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 1in; text-align: left">Item 6.</TD><TD STYLE="text-align: justify">Ownership of
                                         More than Five Percent on Behalf of Another Person:</TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">Not Applicable</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-indent: -1in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 1in; text-align: left">Item 7.</TD><TD STYLE="text-align: left">Identification and
                                         Classification of the Subsidiary Which Acquired the Security Being Reported on by the
                                         Parent Holding Company:</TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">Not Applicable</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-indent: -1in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 1in; text-align: left">Item 8.</TD><TD STYLE="text-align: justify">Identification
                                         and Classification of Members of the Group:</TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">The following lists each member of the group filing
this Schedule 13G/A pursuant to Rule 13d-1(c):</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">Mercury Fund XI, Ltd.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">Mercury Ventures III, Ltd.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">Mercury Management, L.L.C.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">Kevin C. Howe</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-indent: -1in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 1in; text-align: left">Item 9.</TD><TD STYLE="text-align: justify">Notice of Dissolution
                                         of Group:</TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in">Not Applicable</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-indent: -1in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 1in; text-align: left">Item 10.</TD><TD STYLE="text-align: justify">Certification:</TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify">By signing below I certify that,
to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of
or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held
in connection with or as a participant in any transaction having that purpose or effect.</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">[Remainder of Page Intentionally Left
Blank]</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>


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<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<tr style="vertical-align: top">
    <td style="width: 50%">CUSIP No. 237690102</td>
    <td style="width: 50%; text-align: right">Page 10 of 10</td></tr>
</table>
<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">SIGNATURE</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">After reasonable inquiry and to the best
of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<tr style="vertical-align: top">
    <TD NOWRAP>January 19, 2016</td>
    <TD COLSPAN="3" NOWRAP>MERCURY FUND XI, LTD.</td></tr>
<TR STYLE="vertical-align: top">
    <TD NOWRAP>&nbsp;</TD>
    <TD COLSPAN="3" NOWRAP>&nbsp;</TD></TR>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>By:</td>
    <TD COLSPAN="2" NOWRAP>MERCURY VENTURES III, LTD.</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="2" NOWRAP>General Partner</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="2" NOWRAP>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>By:</td>
    <TD COLSPAN="2" NOWRAP>MERCURY MANAGEMENT, L.L.C.</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="2" NOWRAP>General Partner</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="2" NOWRAP>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP STYLE="width: 50%">&nbsp;</td>
    <TD NOWRAP STYLE="width: 5%">&nbsp;</td>
    <TD NOWRAP STYLE="width: 5%">By:</td>
    <TD NOWRAP STYLE="width: 40%; border-bottom: Black 1pt solid">/s/ Kevin C. Howe</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>Name:&nbsp;</td>
    <TD NOWRAP>Kevin C. Howe</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>Title:</td>
    <TD NOWRAP>Manager</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>January 19, 2016</td>
    <TD COLSPAN="3" NOWRAP>MERCURY VENTURES III, LTD.</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="3" NOWRAP>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>By:</td>
    <TD COLSPAN="2" NOWRAP>MERCURY MANAGEMENT, L.L.C.</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="2" NOWRAP>General Partner</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="2" NOWRAP>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>By:</td>
    <TD COLSPAN="2" NOWRAP STYLE="border-bottom: Black 1pt solid">/s/ Kevin C. Howe</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>Name:&nbsp;</td>
    <TD COLSPAN="2" NOWRAP>Kevin C. Howe</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>Title:</td>
    <TD COLSPAN="2" NOWRAP>Manager</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="2" NOWRAP>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>January 19, 2016</td>
    <TD COLSPAN="3" NOWRAP>MERCURY MANAGEMENT, L.L.C.</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="3" NOWRAP>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>By:</td>
    <TD COLSPAN="2" NOWRAP STYLE="border-bottom: Black 1pt solid">/s/ Kevin C. Howe</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>Name:&nbsp;</td>
    <TD COLSPAN="2" NOWRAP>Kevin C. Howe</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>Title:</td>
    <TD COLSPAN="2" NOWRAP>Manager</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="2" NOWRAP>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>January 19, 2016</td>
    <TD COLSPAN="3" NOWRAP STYLE="border-bottom: Black 1pt solid">/s/ Kevin C. Howe</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="3" NOWRAP>Kevin C. Howe</td></tr>
</table>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>EXHIBIT A</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: center; text-indent: -0.5in"><B>JOINT
FILING AGREEMENT</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SCHEDULE 13G/A</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>JOINT FILING AGREEMENT</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">This Agreement is
dated as of January 19, 2016 by and among Mercury Fund XI, Ltd., (&ldquo;Mercury XI&rdquo;), Mercury Ventures III, Ltd. (&ldquo;Mercury
Ventures III&rdquo;), Mercury Management, L.L.C. (&ldquo;Mercury Management&rdquo;) and Kevin C. Howe (&ldquo;Mr. Howe&rdquo;).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">WHEREAS, pursuant
to paragraph&nbsp;(k)(1) of Rule&nbsp;13d-1 promulgated under Section&nbsp;13d(1) of the Securities Exchange Act of 1934, as amended
(the &ldquo;Act&rdquo;), the parties hereto have decided to satisfy their filing obligations under the Act by a single joint filing.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">NOW, THEREFORE, the
undersigned do hereby agree as follows:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-size: 10pt">1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
Schedule&nbsp;13G/A (the &ldquo;Schedule&nbsp;13G/A&rdquo;) with respect to</FONT> <FONT STYLE="font-size: 10pt">Data I/O Corporation,
a Delaware corporation, to which this Agreement is attached as Exhibit&nbsp;A is filed on behalf of Mercury XI, Mercury Ventures
III, Mercury Management and Mr. Howe. Mercury XI, Mercury Ventures III and Mercury Management hereby authorize Mr. Howe to file
the Schedule&nbsp;13G/A on their behalf.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">2.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Each
of Mercury XI, Mercury Ventures III, Mercury Management and Mr. Howe are responsible for the completeness and accuracy of the
information concerning such person or entity contained therein; provided that each person or entity is not responsible for the
completeness or accuracy of the information concerning any other person or entity making such filing.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>[Remainder of Page Intentionally Left
Blank]</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">IN WITNESS WHEREOF,
the undersigned hereunto set their hands as of the date first above written.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="4" NOWRAP>MERCURY FUND XI, LTD.</td></tr>
<TR STYLE="vertical-align: top">
    <TD NOWRAP>&nbsp;</TD>
    <TD COLSPAN="4" NOWRAP>&nbsp;</TD></TR>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>By:</td>
    <TD COLSPAN="3" NOWRAP>MERCURY VENTURES III, LTD.</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="3" NOWRAP>General Partner</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="3" NOWRAP>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>By:</td>
    <TD COLSPAN="2" NOWRAP>MERCURY MANAGEMENT, L.L.C.</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="2" NOWRAP>General Partner</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="2" NOWRAP>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP STYLE="width: 50%">&nbsp;</td>
    <TD NOWRAP STYLE="width: 5%">&nbsp;</td>
    <TD NOWRAP STYLE="width: 5%">&nbsp;</td>
    <TD NOWRAP STYLE="width: 5%">By:</td>
    <TD NOWRAP STYLE="width: 35%; border-bottom: Black 1pt solid">/s/ Kevin C. Howe</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>Name:&nbsp;</td>
    <TD NOWRAP>Kevin C. Howe</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>Title:</td>
    <TD NOWRAP>Manager</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="4" NOWRAP>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="4" NOWRAP>MERCURY VENTURES III, LTD.</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="3" NOWRAP>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>By:</td>
    <TD COLSPAN="3" NOWRAP>MERCURY MANAGEMENT, L.L.C.</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="3" NOWRAP>General Partner</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="3" NOWRAP>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>By:</td>
    <TD COLSPAN="2" NOWRAP STYLE="border-bottom: Black 1pt solid">/s/ Kevin C. Howe</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>Name:&nbsp;</td>
    <TD COLSPAN="2" NOWRAP>Kevin C. Howe</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>Title:</td>
    <TD COLSPAN="2" NOWRAP>Manager</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="4" NOWRAP>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="4" NOWRAP>MERCURY MANAGEMENT, L.L.C.</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="4" NOWRAP>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>By:</td>
    <TD COLSPAN="3" NOWRAP STYLE="border-bottom: Black 1pt solid">/s/ Kevin C. Howe</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>Name:&nbsp;</td>
    <TD COLSPAN="3" NOWRAP>Kevin C. Howe</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>Title:</td>
    <TD COLSPAN="3" NOWRAP>Manager</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="4" NOWRAP>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD COLSPAN="4" NOWRAP STYLE="border-bottom: Black 1pt solid">/s/ Kevin C. Howe</td></tr>
<tr style="vertical-align: top">
    <TD NOWRAP>&nbsp;</td>
    <TD NOWRAP>Name:&nbsp;</td>
    <TD COLSPAN="3" NOWRAP>Kevin C. Howe</td></tr>
</table>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>


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