<DOCUMENT>
<TYPE>EX-99.4
<SEQUENCE>8
<FILENAME>dex994.txt
<DESCRIPTION>FORM OF LETTER TO CLIENTS
<TEXT>
<PAGE>

                                                                    EXHIBIT 99.4

                                 NCR CORPORATION
                                LETTER TO CLIENTS
                                       for
                            Tender of all Outstanding
                      7.125% Series A Senior Notes due 2009
                                 in Exchange for
                      7.125% Series B Senior Notes due 2009
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THE EXCHANGE OFFER WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME, ON May 14, 2003
     UNLESS EXTENDED (THE "EXPIRATION DATE"). OUTSTANDING NOTES TENDERED IN THE
     EXCHANGE OFFER MAY BE WITHDRAWN AT ANY TIME PRIOR TO 5:00 P.M., NEW YORK
     CITY TIME, ON THE EXPIRATION DATE.

--------------------------------------------------------------------------------

To Our Clients:

   We are enclosing herewith a Prospectus, dated April 10, 2003, of NCR
Corporation, a Maryland corporation (the "Company"), and a related Letter of
Transmittal, which together constitute (the "Exchange Offer") relating to the
offer by the Company, to exchange its 7.125% Senior Notes due 2009 (the "New
Notes"), which have been registered under the Securities Act of 1933, as amended
(the "Securities Act"), for a like principal amount of its issued and
outstanding 7.125% Senior Notes due 2009 (the "Outstanding Notes"), upon the
terms and subject to the conditions set forth in the Exchange Offer.

   The Exchange Offer is not conditioned upon any minimum number of Outstanding
Notes being tendered.

   We are the holder of record of Outstanding Notes held by us for your own
account. A tender of such Outstanding Notes can be made only by us as the record
holder and pursuant to your instructions. The Letter of Transmittal is furnished
to you for your information only and cannot be used by you to tender Outstanding
Notes held by us for your account.

   We request instructions as to whether you wish to tender any or all of the
Outstanding Notes held by us for your account pursuant to the terms and
conditions of the Exchange Offer. We urge you to read carefully the prospectus
and the Letter of Transmittal and other material provided herewith before
instructing us to tender your outstanding notes. We also request that you
confirm that we may on your behalf make the representations contained in the
Letter of Transmittal.

   Pursuant to the Letter of Transmittal, each holder of Outstanding Notes will
represent to the Company that (i) the New Notes acquired pursuant to the
Exchange Offer are being acquired in the ordinary course of business of the
undersigned, (ii) neither the undersigned nor any such other person has an
arrangement or understanding with any person to participate in the distribution
within the meaning of the Securities Act of such New Notes, (iii) if the
undersigned is not a broker-dealer, or is a broker-dealer but will not receive
New Notes for its own account in exchange for Outstanding Notes, neither the
undersigned nor any such other person is engaged in or intends to participate in
the distribution of such New Notes and (iv) neither the undersigned nor any such
other person is an "affiliate" of the Company within the meaning of Rule 405
under the

<PAGE>

Securities Act or, if the undersigned is an "affiliate," that the undersigned
will comply with the registration and prospectus delivery requirements of the
Securities Act to the extent applicable. If the undersigned is a broker-dealer
(whether or not it is also an "affiliate") that will receive New Notes for its
own account in exchange for Outstanding Notes, it represents that such
Outstanding Notes were acquired as a result of market-making activities or other
trading activities, and it acknowledges that it will deliver a prospectus
meeting the requirements of the Securities Act in connection with any resale of
such New Notes. By acknowledging that it will deliver and by delivering a
prospectus meeting the requirements of the Securities Act in connection with any
resale of such New Notes, the undersigned is not deemed to admit that it is an
"underwriter" within the meaning of the Securities Act.

                                              Very truly yours,


<PAGE>

     Please return your instructions to us in the enclosed envelope within ample
time to permit us to submit a tender on your behalf prior to the Expiration
Date.

                                 INSTRUCTION TO
                         BOOK ENTRY TRANSFER PARTICIPANT

To Participant of the DTC:

   The undersigned hereby acknowledges receipt of the Prospectus dated April 10,
2003 (the "Prospectus") of NCR Corporation, a Maryland corporation (the
"Company"), and the accompanying Letter of Transmittal (the "Letter of
Transmittal"), that together constitute the Company's offer (the "Exchange
Offer") to exchange its 7.125% Senior Notes due 2009 (the "New Notes"), for all
of its outstanding 7.125% Senior Notes due 2009 (the "Outstanding Notes").
Capitalized terms used but not defined herein have the meanings ascribed to them
in the Prospectus or the Letter of Transmittal.

   This will instruct you, the DTC participant, as to the action to be taken by
you relating to the Exchange Offer with respect to the Outstanding Notes held by
you for the account of the undersigned.

   The aggregate face amount of the Outstanding Notes held by you for the
account of the undersigned is (FILL IN AMOUNT):

   $__________________ of the 7.125% Senior Notes due 2009.

     With respect to the Exchange Offer, the undersigned hereby instructs you
(CHECK APPROPRIATE BOX):

     [_]  To TENDER the following amount of Outstanding Notes held by you for
the account of the undersigned (INSERT PRINCIPAL AMOUNT OF OUTSTANDING NOTES TO
BE TENDERED) (IF ANY): $_____________________.

     [_]  NOT to TENDER any Outstanding Notes held by you for the account of the
undersigned.

   If the undersigned instructs you to tender the Outstanding Notes held by you
for the account of the undersigned, it is understood that you are authorized to
make, on behalf of the undersigned (and the undersigned by, its signature below,
hereby makes to you), the representations contained in the Letter of Transmittal
that are to be made with respect to the undersigned as a beneficial owner,
including, but not limited to, the representations, that (i) the New Notes
acquired pursuant to the Exchange Offer are being acquired in the ordinary
course of business of the undersigned, (ii) neither the undersigned nor any such
other person has an arrangement or understanding with any person to participate
in the distribution within the meaning of the Securities Act of 1933, as amended
(the "Securities Act") of such New Notes, (iii) if the undersigned is not a
broker-dealer, or is a broker-dealer but will not receive New Notes for its own
account in exchange for Outstanding Notes, neither the undersigned nor any such
other person is engaged in or intends to participate in the distribution of such
New Notes and (iv) neither the undersigned nor any such other person is an
"affiliate" of the Company within the meaning of Rule 405 under the Securities
Act or, if the undersigned is an "affiliate," that the undersigned will comply
with the registration and prospectus delivery requirements of the Securities Act
to the extent applicable. If the

<PAGE>

undersigned is a broker-dealer (whether or not it is also an "affiliate") that
will receive New Notes for its own account in exchange for Outstanding Notes, it
represents that such Outstanding Notes were acquired as a result of
market-making activities or other trading activities, and it acknowledges that
it will deliver a prospectus meeting the requirements of the Securities Act in
connection with any resale of such New Notes. By acknowledging that it will
deliver and by delivering a prospectus meeting the requirements of the
Securities Act in connection with any resale of such New Notes, the undersigned
is not deemed to admit that it is an "underwriter" within the meaning of the
Securities Act.

                                    SIGN HERE

Name of beneficial owner(s):____________________________________________________

Signature(s):___________________________________________________________________

Name(s) (please print):_________________________________________________________

Address:________________________________________________________________________

Telephone Number:_______________________________________________________________

Taxpayer Identification or Social Security Number:______________________________

Date:___________________________________________________________________________


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