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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Eof9lP5iCT4WNSevKhrQAo4s4TwfaOqMTmka7v/YwyxP6Ta/Rp6QpM7dJfy/y7BE
 CQby7E+61zhLN9gJ6bu+Ig==

<SEC-DOCUMENT>0001222540-03-000006.txt : 20030804
<SEC-HEADER>0001222540-03-000006.hdr.sgml : 20030804
<ACCEPTANCE-DATETIME>20030804183658
ACCESSION NUMBER:		0001222540-03-000006
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030731
FILED AS OF DATE:		20030804

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HUME FREDERICK R
		CENTRAL INDEX KEY:			0001222540

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-10394
		FILM NUMBER:		03821821

	MAIL ADDRESS:	
		STREET 1:		DATA IO CORP
		STREET 2:		10525 WILLOWS RD NE PO BOX 97046
		CITY:			REDMOND
		STATE:			WA
		ZIP:			98073-9746

ISSUER:		

	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:			1231

	BUSINESS ADDRESS:	
		STREET 1:		10525 WILLOWS RD NE
		STREET 2:		P O BOX 97046
		CITY:			REDMOND
		STATE:			WA
		ZIP:			98073-9746
		BUSINESS PHONE:		4258676922

	MAIL ADDRESS:	
		STREET 1:		P O BOX 97046
		STREET 2:		10525 WILLOWS RD NE
		CITY:			REDMOND
		STATE:			WA
		ZIP:			98073-9746
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-07-31</periodOfReport>
    <issuer>
        <issuerCik>0000351998</issuerCik>
        <issuerName>DATA I/O CORP</issuerName>
        <issuerTradingSymbol>DAIO</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001222540</rptOwnerCik>
            <rptOwnerName>HUME FREDERICK R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>10525 WILLOWS ROAD N.E.</rptOwnerStreet1>
            <rptOwnerStreet2>P.O. BOX 97046</rptOwnerStreet2>
            <rptOwnerCity>REDMOND</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>98052</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>President and CEO</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value><footnoteId id="F1"/></securityTitle><transactionDate><value>2003-07-31</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>J</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>4706</value></transactionShares><transactionPricePerShare><value>.765</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>27463</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnersh
ip><natureOfOwnership><value/></natureOfOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes><footnote id="F1">Shares were acquired through the Company's 1982 Employee Stock Purchase Plan</footnote></footnotes><remarks/><ownerSignature><signatureName>Joel S. Hatlen, by Power of Attorney</signatureName><signatureDate>2003-08-04</signatureDate></ownerSignature></ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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