Exhibit 99(b)


                                   BNP PARIBAS
                               787 SEVENTH AVENUE
                            NEW YORK, NEW YORK 10019

                                                                   July 24, 2001


Sirsi Corporation
101 Washington St. SE
Huntsville, AL  35801

Attn.:   Larry Smith
         Chief Financial Officer

RE:    ACQUISITION FINANCING
- ----------------------------


Ladies and Gentlemen:

         You have advised BNP Paribas that a newly formed subsidiary ("McGuire
Acquisition Inc.") of Sirsi Holdings Corp. ("Holdings") intends to make a tender
offer (the "Tender Offer") for all the outstanding common stock of Data Research
Associates, Inc. ("DRA") for $11.00 per share in cash, resulting in a total
purchase price of approximately $49.7 million. Following completion of the
Tender Offer, McGuire Acquisition Inc. will be merged into DRA (the "Merger",
and together with the Tender Offer, the "Acquisition"), at which time any shares
of DRA not tendered will be converted into the right to receive in cash the
Tender Offer price. All terms and conditions of the Tender Offer and Merger, and
the structure thereof, will be consistent with the provisions of the Agreement
and Plan of Merger, dated as of May 16, 2001 (the "Merger Agreement"), among
DRA, McGuire Acquisition Inc. and Holdings, as in effect on the date hereof, and
otherwise shall be satisfactory to BNP Paribas.

         BNP Paribas understands that all funding required to effect the
Acquisition, to pay fees and expenses in connection therewith (which fees and
expenses shall not exceed $4.0 million) and to refinance (the "Refinancing") the
current senior debt (not more than approximately $11.25 million of which shall
be funded, less any amounts amortized prior to the Closing Date (as defined
below)) of Sirsi Corporation ("Sirsi") will be provided solely through (i) the
incurrence by Sirsi of $45.0 million of senior secured facilities (the "Senior
Secured Facilities") more fully described in the term sheet attached hereto as
Exhibit A (the "Term Sheet"), (ii) the use of cash on hand of Sirsi and DRA
(which cash will be loaned, to the extent needed, to Holdings pursuant to a
subordinated credit facility (the "DRA Facility") acceptable to BNP Paribas),
(iii) at least $2.2 million of additional proceeds of new common equity
contributions from existing equity holders of Holdings (the "Additional Equity
Investment") and (iv) the proceeds of at least $1.0 million of additional
subordinated loans to Holdings in the form of an increase in the existing
Holdings seller note (the "Additional Seller Note Financing" and, together with
the Senior Secured Facilities, the DRA Facility and the Additional Equity
Investment, the "Financing Transactions", and the Financing Transactions,
together with the Acquisition and the Refinancing, the "Transaction"); PROVIDED
that the amount of the Additional Seller Note Financing required to be issued
shall be reduced, and to the extent such permitted reduction would otherwise
exceed $1.0 million, the amount of the


                                       1


Additional Equity Investment shall be reduced to the extent of such excess, by
an amount equal to the amount by which the aggregate proceeds of the Financing
Transactions available to pay amounts owing in connection with the Transaction
and to pay fees and expenses incurred or expected to be incurred in connection
therewith (including for this purpose the full amount of the Additional Equity
Investment and the Additional Seller Note Financing, but including only that
portion of the Senior Secured Facilities otherwise available for such purpose to
the extent Holdings' pro-forma (after giving effect to the Transaction and
assuming that 100% of the common equity of DRA had been acquired) consolidated
leverage ratio (calculated on a latest twelve month basis without giving effect
to Holdings' existing seller notes, the Additional Seller Note Financing or the
DRA Facility and otherwise in a manner acceptable to BNP Paribas) would not
exceed 3.30:1.00 on the Closing Date (as defined below)) exceed the aggregate
amount required to fund the Transaction and to pay such fees and expenses.

         BNP Paribas is pleased to confirm that it (i) is willing to provide,
on, and subject to the terms and conditions set forth herein and in the Term
Sheet , 100% of the Senior Secured Facilities and (ii) will act as sole
administrative agent (the "Agent") under the Senior Secured Facilities. BNP
Paribas (or an affiliate designated by BNP Paribas) shall act as, and be
designated as, lead arranger with respect to the Senior Secured Facilities. You
agree that no other agents, co-agents or arrangers will be appointed, no other
titles will be awarded, and no compensation (other than that expressly
contemplated by the Term Sheet and the Fee Letter referred to below) will be
paid in connection with the Senior Secured Facilities, unless you and we shall
so agree.

         BNP Paribas reserves the right, prior to or after execution of the
definitive credit documentation, to syndicate all or part of its commitment
hereunder to one or more financial institutions (collectively with BNP Paribas,
the "Lenders") that will become party to such definitive credit documentation
pursuant to a syndication to be managed by BNP Paribas. BNP Paribas will
commence syndication promptly after the execution of this letter by you and you
agree to actively assist BNP Paribas in achieving a syndication that is
satisfactory to BNP Paribas and you. Such syndication will be accomplished by a
variety of means, including direct contact during the syndication between senior
management and advisors of Holdings, Sirsi and (to the extent practicable) DRA
and the proposed syndicate members. To assist BNP Paribas in its syndication
efforts, you hereby agree (a) to provide and cause your advisors to provide BNP
Paribas and the other syndicate members upon request with all reasonable
information deemed necessary by us to complete syndication, including but not
limited to information and evaluations prepared by Holdings, Sirsi, McGuire
Acquisition Inc., DRA, or any of your or their respective advisors, relating to
the Transaction and the other transactions contemplated hereby, (b) to assist
BNP Paribas upon request in the preparation of an Information Memorandum to be
used in connection with the syndication of the Senior Secured Facilities and (c)
to make available the senior officers and representatives of Holdings, Sirsi,
McGuire Acquisition, Inc. and (to the extent practicable) DRA, in each case from
time to time and to attend and make presentations regarding the business and
prospects of Sirsi and DRA and their respective subsidiaries at a meeting or
meetings of Lenders or prospective Lenders.

         BNP Paribas' commitment hereunder is subject to (a) there not occurring
or becoming known to BNP Paribas any material adverse condition or material
adverse change in or affecting the business, property, assets, liabilities,
condition (financial or otherwise) or prospects of Holdings, DRA and their
respective subsidiaries taken as a whole, (b) BNP Paribas not becoming aware
after the date hereof of any information not previously known to BNP Paribas
which BNP Paribas reasonably believes is materially negative information with
respect to the Transaction, the business, property, assets, liabilities,
condition (financial or otherwise) or prospects of Holdings, DRA and their
respective subsidiaries taken


                                       2


as a whole, or which is inconsistent in a material and adverse manner with any
such information or other matter disclosed to BNP Paribas prior to the date
hereof, (c) there not having occurred, after the date hereof, a change in the
financial, banking or capital markets generally that, in BNP Paribas' reasonable
judgment, would materially and adversely affect the syndication of the Senior
Secured Facilities, (d) BNP Paribas' reasonable satisfaction that prior to and
during the syndication of the Senior Secured Facilities there shall be no
competing offering, placement or arrangement of any debt securities or bank
financing (other that the DRA Facility) by or on behalf of Holdings or DRA, or
any of their respective subsidiaries or affiliates, and (e) the other conditions
set forth or referred to in the Term Sheet.

         To induce BNP Paribas to issue this letter, to proceed with its
syndication efforts, and to proceed with the documentation of the proposed
financing, you hereby agree that all fees and expenses (including the reasonable
fees and expenses of counsel and consultants (including the costs and expenses
of David McQueston, an independent consultant whose fees we estimate to be
between $10,000 and $15,000)) of BNP Paribas and its affiliates (collectively
"BNPP") arising in connection with this letter, our due diligence efforts, and
in connection with the Transaction and the other transactions described herein
shall be for your account, whether or not the Senior Secured Facilities are made
available or definitive credit documents are executed. You further agree to
indemnify and hold harmless each Lender (including in any event BNPP) and each
director, officer, employee and affiliate thereof (each an "indemnified person")
from and against any and all actions, suits, proceedings (including any
investigations or inquiries), claims, losses, damages, liabilities or expenses
of any kind or nature whatsoever which may be incurred by or asserted against or
involve any Lender or any other such indemnified person as a result of or
arising out of or in any way related to or resulting from this letter and, upon
demand, to pay and reimburse each Lender and each other indemnified person for
any reasonable legal or other out-of-pocket expenses incurred in connection with
investigating, defending or preparing to defend any such action, suit,
proceeding (including any inquiry or investigation) or claim (whether or not any
Lender or any other such person is a party to any action or proceeding out of
which any such expenses arise); PROVIDED, HOWEVER, that you shall not have to
indemnify any indemnified person against any loss, claim, damage, expense or
liability to the extent same resulted from the gross negligence or wilful
misconduct of the respective indemnified person as finally and judicially
decided by a court of competent jurisdiction. This letter and the Term Sheet
(collectively, the "Commitment Letter") is issued for your benefit and the
benefit of McGuire Acquisition Inc. only and no other person or entity may rely
hereon or thereon. Neither BNP Paribas nor any other indemnified person shall be
responsible or liable to you or any other person for consequential damages which
may be alleged as a result of this letter or the financing contemplated hereby.

         BNP Paribas reserves the right to employ the services of its affiliates
in providing services contemplated by this letter and to allocate, in whole or
in part, to its affiliates certain fees payable to BNP Paribas in such manner as
BNP Paribas and its affiliates may agree in their sole discretion. You also
agree that BNP Paribas may at any time and from time to time assign all or any
portion of its commitments hereunder to one or more of its affiliates. You
further acknowledge that BNP Paribas may share with any of its affiliates any
information related to the Transaction, DRA, Holdings, Sirsi, and your and their
respective subsidiaries and affiliates, or any of the matters contemplated
hereby. BNP Paribas agrees to treat, and cause any such affiliate to treat, all
non-public information provided to it by Holdings, Sirsi or DRA as confidential
information in accordance with customary banking industry practices. You
acknowledge that BNP Paribas and its affiliates may be providing debt financing,
equity capital or other services (including financial advisory services) to
other companies in respect of which you may have conflicting interests. Neither
BNP Paribas nor its affiliates will use confidential information obtained from
you in relation to the Transaction or its other relationships with you in



                                       3


connection with the performance by BNP Paribas or any affiliate thereof of
services for other companies, and none of BNP Paribas and its affiliates will
furnish any such information to other companies. You also acknowledge that BNP
Paribas and its affiliates do not have any obligation to use in connection with
the Transaction, or to furnish to you, confidential information obtained by BNP
Paribas or any affiliate thereof from other companies.

         You agree that this Commitment Letter is for your confidential use only
and that neither its existence nor the terms hereof will be disclosed by you to
any person other than your officers, directors, employees, accountants,
attorneys and other advisors, and then only on a "need to know" basis in
connection with the transactions contemplated hereby and on a confidential
basis, except that you may disclose it to DRA and/or its agents in connection
with the proposed Transaction. Notwithstanding the foregoing, following your
acceptance of the provisions hereof and your return of an executed counterpart
of this Commitment Letter and the related Fee Letter to us as provided below,
(i) you may make public disclosure of the existence and amount of the
commitments hereunder and of the identity of the Agent, (ii) you may file a copy
of this Commitment Letter (but not the Fee Letter) in any public record in which
it is required by law to be filed and (iii) you may make such other public
disclosure of the terms and conditions hereof as, and to the extent, you are
required by law, based upon the good faith advice of your counsel, to make.
Except as otherwise required by law or unless BNP Paribas has otherwise
consented, you are not authorized prior to your acceptance of this letter as
provided below to show or circulate this letter to any other person or entity
(other than your legal or financial advisors in connection with your evaluation
hereof). If this letter is not accepted by you as provided below, please
immediately return this letter (and any copies hereof) to the undersigned.

         This letter may be executed in any number of counterparts, and by the
different parties hereto on separated counterparts, each of which when executed
and delivered shall be an original, but all of which shall together constitute
one and the same instrument. THIS LETTER AND THE TERM SHEET AND THE RIGHTS AND
OBLIGATIONS OF THE PARTIES HERETO SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK. ANY RIGHT TO TRIAL BY JURY
WITH RESPECT TO ANY CLAIM, ACTION, SUIT OR PROCEEDING ARISING OUT OF THIS LETTER
IS HEREBY WAIVED.

         The provisions of the four immediately preceding paragraphs shall
survive any termination of this letter.

         BNP Paribas' commitment to provide the Senior Secured Facilities as set
forth above will terminate on the first to occur of (i) October 5, 2001, unless
on or prior to such date the initial borrowings shall have occurred under a
definitive credit agreement evidencing the Senior Secured Facilities (the
"Credit Agreement"), reflecting terms consistent with those set forth herein and
in the Term Sheet and otherwise in form satisfactory to BNP Paribas and (ii) any
time prior to the consummation of the Acquisition that you shall inform BNP
Paribas that you have terminated your negotiations in respect of the
Acquisition.

                                     * * * *


                                       4



                  If you are in agreement with the foregoing, please sign and
return to BNP Paribas the enclosed copy of this letter, together with a copy of
the enclosed Fee Letter, no later than 5:00 P.M. (New York time) on July 24,
2001. Unless this letter and the related Fee Letter are signed and returned in
accordance with the immediately preceding sentence, this letter shall terminate
at such time and date.

                                       Very truly yours,


                                       BNP PARIBAS
   /s/ Edward Irwin                                       /s/ Judith A. Keane
   -------------------                                    ----------------------
   Edward Irwin                                           Judith A. Keane
   Managing Director                                      Vice President




Agreed to and Accepted this
24th day of July, 2001

SIRSI  CORPORATION


By: /s/ Larry Smith
   --------------------------------
     Larry Smith
     Title: Chief Financial Officer


                                       5


                                   EXHIBIT A

                                SIRSI CORPORATION
                            SENIOR SECURED FACILITIES
             INDICATIVE SUMMARY OF PRINCIPAL TERMS AND CONDITIONS1

I.   DESCRIPTION OF SENIOR SECURED FACILITIES

Borrower:               Sirsi Corporation or other entity acceptable to BNP
                        Paribas (the "Borrower").

Guarantors:             Sirsi Holdings Corp. ("Holdings") and all direct and
                        indirect domestic subsidiaries of Holdings other than
                        the Borrower (but including DRA and its domestic
                        subsidiaries only after the Merger).

Agent:                  BNP Paribas.

Lenders:                A group of financial institutions to be arranged by the
                        Agent.

Senior Secured
Facilities:             The Senior Secured Facilities will be comprised of two
                        separate facilities:

                        A.    A term loan facility (the "Term Loan Facility") in
                              an aggregate principal amount of $37.0 million;
                              and

                        B.    A revolving loan facility (the "Revolving Loan
                              Facility") in an aggregate principal amount of up
                              to $8.0 million. A sub-limit of $1.50 million of
                              the Revolving Loan Facility will be available for
                              the issuance of letters of credit ("Letters of
                              Credit").

A.  TERM LOAN FACILITY

Availability:           Loans made pursuant to the Term Loan Facility (the "Term
                        Loans") may be borrowed upon (x) the initial closing
                        date for the Tender Offer (the "Closing Date"), (y) up
                        to two times after the Closing Date and prior to the
                        date on which the Merger is consummated (the "Merger
                        Date"), and (z) the Merger Date. Term Loans that are
                        repaid or prepaid may not be re-borrowed.

Use of Proceeds:        The proceeds of Term Loans will be used solely (x) to
                        refinance the outstanding senior debt of the Borrower
                        not in excess of $11.25 million, (y) to finance, in
                        part, the purchase of DRA shares tendered pursuant to
                        the Tender Offer and the cash-out of any untendered DRA
                        shares pursuant to the Merger and (z) to pay transaction
                        costs (including severance expenses and payments to
                        certain option holders of DRA stock) and expenses
                        incurred in connection with the Transaction.



- ----------

(1) Capitalized terms used herein and not otherwise defined shall have the
meaning set forth in the Retainer Letter to which this Summary of Certain Terms
and conditions is attached.


                                       1


                                                                       EXHIBIT A


Amortization:           The Term Loans shall be subject to quarterly
                        amortization payments commencing on December 31, 2001 in
                        accordance with the following schedule:




                           ------------------------------------------------
                                 Quarter Ending         Amortization
                           ------------------------------------------------
                                                      
                                December 31, 2001             $800,000

                                 March 31, 2002             $1,150,000
                                  June 30, 2002             $1,150,000
                               September 30, 2002           $1,150,000
                                December 31, 2002           $1,150,000

                                 March 31, 2003             $1,700,000
                                  June 30, 2003             $1,700,000
                               September 30, 2003           $1,700,000
                                December 31, 2003           $1,700,000


                                 March 31, 2004             $1,950,000
                                  June 30, 2004             $1,950,000
                               September 30, 2004           $1,950,000
                                December 31, 2004           $1,950,000


                                 March 31, 2005             $2,050,000
                                  June 30, 2005             $2,050,000
                               September 30, 2005           $2,050,000
                                December 31, 2005           $2,050,000

                                 March 31, 2006             $2,200,000
                                  June 30, 2006             $2,200,000
                               September 30, 2006           $2,200,000
                                December 31, 2006           $2,200,000

                           ------------------------------------------------
                                      Total                $37,000,000
                           ------------------------------------------------



Maturity:               The final maturity of the Term Loans shall be December
                        31, 2006 (the "Maturity Date").

B.  REVOLVING FACILITY

Availability:           Loans made pursuant to the Revolving Loan Facility (the
                        "Revolving Loans" and together with the Term Loans, the
                        "Loans") may be borrowed repaid and reborrowed on and
                        after the Closing Date and prior to the Maturity Date;
                        PROVIDED that (i) Revolving Loans may only be used to
                        fund the Transaction and to pay fees and expenses in
                        connection therewith to the extent Holdings' pro-forma
                        (after giving effect to the Transaction and assuming
                        that 100% of the common equity of DRA had been acquired)
                        consolidated leverage ratio (calculated on a latest
                        twelve


                                       2


                                                                       EXHIBIT A

                        month basis without giving effect to Holdings' existing
                        seller notes, the Additional Seller Note Financing or
                        the DRA Facility and otherwise in a manner acceptable to
                        BNP Paribas) would not exceed 3.30:1.00 on the Closing
                        Date and (ii) not more than (x) the amount of Revolving
                        Loans determined in accordance with clause (i) above
                        MINUS (y) $11.00 multiplied by the number of outstanding
                        shares of DRA not tendered and acquired on the Closing
                        Date pursuant to the Tender ----- Offer, may be used on
                        the Closing Date to fund the Transaction and to pay
                        costs and expenses in connection therewith. In addition,
                        the Borrower shall be required to maintain availability
                        under the Revolving Loan Facility after the Closing Date
                        sufficient (when combined with the Borrower's available
                        cash and remaining undrawn Term Loan commitments) to
                        finance the purchase or cash-out of any DRA shares
                        remaining after consummation of the Tender Offer.

Use of Proceeds:        The proceeds of all Revolving Loans shall be used for
                        general corporate and working capital purposes of the
                        Borrower and its subsidiaries; PROVIDED that proceeds of
                        Revolving Loans may only be used to finance the
                        Transaction and to pay costs and expenses incurred in
                        connection therewith to the extent provided above under
                        "Availability".

Maturity:               All Revolving Loans will mature, and the remaining
                        commitments of the Lenders under the Revolving Loan
                        Facility will terminate, on the Maturity Date.


II.   GENERAL TERMS APPLICABLE TO THE SENIOR SECURED FACILITIES

Guaranties:             Holdings and all domestic subsidiaries of Holdings other
                        than the Borrower, including McGuire Acquisition Inc.,
                        but including DRA and its subsidiaries only on and after
                        the Merger Date (collectively, the "Guarantors") shall
                        be required to provide unconditional and irrevocable
                        guaranties of all amounts owing under the Senior Secured
                        Facilities.

Security:               The obligations under the Senior Secured Facilities and
                        the Guaranties described above will be secured by (i) a
                        first priority perfected pledge of all capital stock
                        (limited in the case of foreign subsidiaries, to a
                        pledge of 65% of all voting stock and 100% of all
                        non-voting stock), notes and securities owned by the
                        Borrower and each Guarantor (each a "Credit Party") and
                        (ii) first priority liens on and security interests in
                        all other tangible and intangible assets (including,
                        without limitation, receivables, intellectual property,
                        contract rights, real property, leasehold interests,
                        inventory and equipment) owned by each Credit Party,
                        subject to such exceptions as may be satisfactory to the
                        Agent. For purposes of Regulation U of the Board of
                        Governors of the Federal Reserve System ("Regulation
                        U"), the portion of the Term Loans used to finance the
                        Tender Offer will be secured by a first lien on the
                        shares of DRA purchased pursuant to the Tender Offer and
                        a second lien on all other Collateral


                                       3


                                                                       EXHIBIT A

                        (the "Other Collateral"), with the remainder of the
                        Senior Secured Facilities to be secured by a first lien
                        on the Other Collateral and a second lien on the DRA
                        shares. The Collateral must satisfy the requirements of
                        Regulation U. On and after the Merger Date, all
                        outstandings will be secured PARI PASSU by all
                        Collateral.

Commitment Fees:        1/2 of 1% per annum on the unused commitments of
                        each Lender under the Senior Secured Facilities, as in
                        effect from time to time, commencing on the Closing Date
                        to and including the termination of such commitments,
                        payable quarterly in arrears and upon such termination
                        of the respective commitments. All commitment fees and
                        interest shall be computed on a 360-day basis.

Interest Rates:         At the Borrowers' option, the interest rates per annum
                        shall be LIBOR (adjusted for maximum reserves) or Base
                        Rate plus, in each case, the Applicable Margin, as
                        follows:




                        ---------------------------------------------------------------------------------
                          CONSOLIDATED SENIOR DEBT/CONSOLIDATED EBITDA        LIBOR         BASE RATE
                                    (TRAILING TWELVE MONTHS)                  MARGIN          MARGIN
                        ---------------------------------------------------------------------------------
                                                                                      
                                X is greater than  2.50:1                       3.50%           2.25%
                           2.50:1 is equal to or greater than                   3.00%           1.75%
                                X is greater than 2.00:1
                           2.00:1 is equal to or greater than
                                X is greater than 1.50:1                        2.75%           1.50%
                                X is less than or equal to 1.50:1               2.50%           1.25%
                        ---------------------------------------------------------------------------------


                        Regardless of the actual level of the ratio of
                        Consolidated Senior Debt to Consolidated EBITDA (the
                        "Leverage Ratio"), the highest Applicable Margins will
                        remain in effect until receipt of a compliance
                        certificate for the period ending nine months following
                        the Merger Date (with the consolidated EBITDA of DRA and
                        its subsidiaries to be included only for the portion of
                        such period commencing on the Merger Date).

                        The Borrower may elect whether borrowings will be Base
                        Rate borrowings or 1-, 2-, 3- or 6-month adjusted LIBOR
                        borrowings; provided, however, only Base Rate or 2-week
                        LIBOR borrowings may be incurred prior to the 90th day
                        after the Closing Date. Interest shall be payable at the
                        end of each interest period and, in any event, at least
                        every three months. Calculation of interest shall be on
                        the basis of actual days elapsed in a year of 360 days.

                        The Base Rate shall be the higher of (i) the Federal
                        Funds Rate plus 1/2 of 1% and (ii) the Prime Commercial
                        Lending Rate of the Chase Manhattan Bank, N.A., as
                        announced from time to time.

Fees:                   The Borrower shall pay all fees as have been separately
                        agreed to with the Agent.

Optional Prepayment:    All or any portion of the outstanding Loans may be
                        prepaid at any time and commitments may be terminated in
                        whole or in part at the option of the Borrower upon
                        customary written notice, without premium or penalty,
                        except that LIBOR-based loans can only be voluntarily
                        prepaid at the end of the applicable interest period
                        unless customary breakage fees are paid. All optional
                        prepayments of Term Loans will be applied


                                       4


                                                                       EXHIBIT A

                        to the remaining scheduled principal payments of Term
                        Loans on a pro-rata basis.

Mandatory  Prepayment:  Subject to exceptions and reinvestment rights consistent
                        with those in the existing credit agreement among Sirsi,
                        the lenders party thereto from time to time, and BNP
                        Paribas, as agent (the "Existing Credit Agreement"),
                        Term Loans shall be prepaid (and once all Term Loans
                        have been repaid, the commitments under the Revolving
                        Loan Facility will be reduced) in an amount equal to:

                        (i)   100% of the net cash proceeds of all asset sales
                              or other dispositions (except inventory in the
                              ordinary course of business) by Holdings or any
                              subsidiary;

                        (ii)  The percentage specified below of Excess Cash Flow
                              (the "Cash Flow Sweep"), which is as follows:

                              (a)   75% of Excess Cash Flow when the Leverage
                                    Ratio is 2.00:1 or greater at fiscal year
                                    end; and

                              (b)   50% of Excess Cash Flow when the Leverage
                                    Ratio is less than 2.00:1 at fiscal year
                                    end.

                        (iii) 100% of the net cash proceeds of any debt or
                              equity financings for Holdings or any of its
                              subsidiaries; and

                        (iv)  100% of all insurance proceeds.

                        In addition, on any date that the aggregate principal
                        amount of Revolving Loans outstanding, plus Letter of
                        Credit outstandings, exceeds the Revolving Loan
                        Commitments as in effect at such time, Revolving Loans
                        shall be required to be repaid (and, to the extent
                        necessary, letters of credit shall be required to be
                        cash collateralized) in an amount equal to such excess.

Seller Note:            The Borrower will be permitted to pay dividends to
                        Holdings to service interest payments on the existing
                        $22 million Seller Note and the Additional Seller Note
                        Financing (if any) (collectively the "Holdco Notes"),
                        subject to (i) cash interest on the Holdco Notes being
                        capped at 7.0% per annum at all times prior to March 31,
                        2004 and 9.0% per annum thereafter, (ii) the absence of
                        any default or event of default under the Credit
                        Agreement, (iii) the availability of cash to service
                        such payment determined on the same basis as provided in
                        the Existing Credit Agreement as in effect on the date
                        hereof and (iv) the Agent's satisfaction with all terms
                        and conditions of the Holdco Notes (including any
                        variations from those contained in the existing Seller
                        Note. In any event, the Holdco Notes shall remain a
                        liability of Holdings and shall be capitalized as equity
                        on the balance sheet of the Borrower. Beginning in 2004
                        (and in each case after giving effect to the Excess Cash
                        Flow Sweep determined in accordance with the audited
                        financial statements of


                                       5


                                                                       EXHIBIT A

                        Holdings and its subsidiaries for the most recently
                        ended fiscal year of Holdings), the Borrower will be
                        permitted to pay dividends to Holdings in an amount
                        equal to the Excess Cash Flow for such most recently
                        ended fiscal year less the Cash Flow Sweep, so long as
                        such dividends are promptly applied to reduce the
                        outstanding obligations under the Holdco Notes.

Representations
and Warranties:         The Credit Agreement will contain representations and
                        warranties comparable to those in the Existing Credit
                        Agreement (updated where appropriate) and others deemed
                        by the Agent as appropriate to the transaction.

Covenants:              The Credit Agreement will contain negative, affirmative
                        and financial covenants and reporting requirements
                        comparable to those in the Existing Credit Agreement
                        (updated where appropriate). In any event, financial
                        covenants will include minimum interest coverage,
                        minimum fixed charge coverage, maximum leverage, minimum
                        EBITDA and maximum capital expenditures (including,
                        without limitation, restrictions on capitalization of
                        software development expenses). Any changes to the
                        historical accounting practices of Holdings and its
                        subsidiaries and/or DRA and its subsidiaries shall be
                        required to be satisfactory to BNP Paribas.

Conditions Precedent
to the Initial Loans:   The conditions to the funding of the initial advances
                        under the Senior Secured Facilities shall be those
                        customarily found in the Agent's loan agreements for
                        similar senior financings and others deemed by the Agent
                        to be appropriate to the specific transaction, and in
                        any event including, without limitation:

                        1.    Negotiation and execution of a definitive Credit
                              Agreement and related credit documentation
                              (including, without limitation, guaranties and
                              security documents) satisfactory to the Agent;

                        2.    No material adverse change to the business,
                              assets, operations, liabilities, condition
                              (financial or otherwise) or prospects of Holdings,
                              DRA and their respective subsidiaries taken as a
                              whole (a "Material Adverse Effect");

                        3.    There not having occurred, after the date hereof,
                              a change in the financial, banking or capital
                              markets generally that, in BNP Paribas' reasonable
                              judgment, would materially and adversely affect
                              the syndication of the Senior Secured Facilities,
                              and Holdings and the Borrower shall have fully
                              cooperated in the syndication efforts;

                        4.    No pending or threatened litigation that the Agent
                              determines would be reasonably likely to have a
                              Material Adverse Effect;

                        5.    Receipt of such environmental and hazardous
                              substance analyses


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                                                                       EXHIBIT A

                              as may have been requested by the Agent, and the
                              Agent's satisfaction therewith.

                        6.    Compliance in all material respects with laws and
                              regulations (including Regulation U), and absence
                              of defaults or material conflicts with other
                              agreements;

                        7.    Receipt of all necessary governmental (domestic
                              and foreign) and third party approvals and/or
                              consents in connection with the Transaction and
                              the other transactions contemplated by the Senior
                              Secured Facilities, and expiration of all
                              applicable waiting periods without any action
                              being taken which, in the judgment of the Agent,
                              restrains, prevents, or imposes materially adverse
                              conditions upon, the consummation of the
                              Transaction or the transactions contemplated by
                              the Senior Secured Facilities;

                        8.    Receipt by the Agent of satisfactory legal
                              opinions;

                        9.    Agent's satisfaction with insurance coverage of
                              Credit Parties;

                        10.   Agent's satisfaction with any modifications to the
                              Seller Notes;

                        11.   Agent's satisfaction with all terms of, and
                              documentation for, the Tender Offer, Merger (to
                              the extent of any inconsistencies with the Merger
                              Agreement as in effect on the date hereof and
                              previously delivered to BNP Paribas) and all other
                              aspects of the transactions contemplated hereby,
                              including, without limitation, that at least 75%
                              of the outstanding common stock of DRA (on a fully
                              diluted basis) is acquired pursuant to the Tender
                              Offer on the Closing Date;

                        12.   Receipt by Holdings of all required proceeds from
                              the Additional Equity Investment and the
                              Additional Seller Note Financing (with the amount
                              of such required proceeds to be determined in
                              accordance with the second paragraph of the
                              Commitment Letter, including the proviso thereto),
                              in each case on terms and conditions, and subject
                              to documentation, satisfactory to BNP Paribas (it
                              being understood that the Additional Seller Note
                              Financing shall be issued on terms substantially
                              identical to those governing the existing Seller
                              Note, with such changes thereto as may be
                              acceptable to BNP Paribas), and the Additional
                              Equity Investment and the Additional Seller Note
                              Financing shall have been consummated in
                              accordance with the documentation therefor and all
                              applicable laws, and all conditions precedent
                              thereto shall have been satisfied in all material
                              respects without any waivers or amendments thereto
                              unless consented to by BNP Paribas.

                        13.   The DRA Facility shall have been authorized,
                              executed and delivered on terms acceptable to the
                              Agent (it being understood that the draft form
                              thereof dated July __, 2001 and previously
                              delivered to the Agent shall be satisfactory, with
                              any changes thereto to be subject to the prior
                              approval of BNP Paribas), and


                                       7


                              all proceeds of the Additional Equity Investment,
                              the Additional Seller Note Financing and the DRA
                              Facility shall have been used to effect the
                              Transaction before any proceeds of Loans are used
                              for such purpose;

                        14.   There shall on the Closing Date be unrestricted
                              cash on hand of the Borrower and unrestricted cash
                              on hand of DRA in each case in amounts reasonably
                              satisfactory to the Agent, which, when added to
                              (i) the aggregate amount of the Additional Equity
                              Investment, (ii) the Additional Seller Note
                              Financing, (iii) Term Loans incurred on the
                              Closing Date, (iv) Term Loan commitments remaining
                              undrawn on the Closing Date, and (v) commitments
                              in respect of Revolving Loans to the extent
                              Holdings' pro-forma (after giving effect to the
                              Transaction and assuming that 100% of the common
                              equity of DRA had been acquired) consolidated
                              leverage ratio (calculated on a latest twelve
                              month basis without giving effect to Holdings'
                              existing seller notes, the Additional Seller Note
                              Financing or the DRA Facility and otherwise in a
                              manner acceptable to BNP Paribas) would not exceed
                              3.30:1.00 on the Closing Date, shall be sufficient
                              to effect the Transaction and to pay fees and
                              expenses in connection therewith;

                        15.   Receipt of a solvency certificate satisfactory to
                              the Agent;

                        16.   The Agent's satisfaction that the Borrower's
                              pro-forma leverage ratio (calculated on a latest
                              twelve month basis without giving effect to the
                              Holdco Notes or the DRA Facility, and otherwise in
                              a manner acceptable to the Agent) on the Closing
                              Date shall not exceed 3.30:1.00, and Holdings and
                              its subsidiaries shall not have outstanding any
                              debt for borrowed money other than the Senior
                              Secured Facilities, the DRA Facility, the Holdco
                              Notes and such other indebtedness as may be
                              satisfactory to the Agent;

                        17.   Receipt of satisfactory historical and PRO FORMA
                              balance sheets and related financial statements;
                              and

                        18.   Payment of all costs, fees and expenses
                              (including, without limitation, legal fees and
                              expenses) and other compensation payable to the
                              Agent and/or the Lenders in respect of the
                              Transaction to the extent due.

Conditions Precedent
to All Loans:           1.    All representations and warranties shall be true
                              and correct on and as of the date of the borrowing
                              (although any representations and warranties which
                              expressly relate to a given date or period shall
                              be required to be true and correct as of the
                              respective date or for the respective period, as
                              the case may be), before and after giving effect
                              to such borrowing and to the application of the
                              proceeds therefrom, as though made on and as


                                       8


                                                                       EXHIBIT A

                              of such date; and

                        2.    No Event of Default, or event which with the
                              giving of notice or lapse of time or both would be
                              an Event of Default, shall have occurred and be
                              continuing, or would result from such borrowing.


Assignments/
Participations:         Assignments of commitments and/or Loans may be made by
                        the Lenders at any time at or after closing, subject to
                        minimum amounts acceptable to Agent. Customary
                        participation rights will be available to all Lenders.

Events of Default:      Events of Default shall include those events of default
                        in the Existing Credit Agreement (updated where
                        appropriate) and others deemed by the Agent as
                        appropriate to this transaction, including, but not
                        limited to, a cross default and a change of control.

Interest Rate
Protection:             Interest rate protection satisfactory to the Agent shall
                        be obtained within 60 days after the Merger Date.

Miscellaneous:          The Credit Documents will include standard yield
                        protection (including compliance with risk-based capital
                        guidelines, increased costs, payments free and clear of
                        withholding taxes and interest period breakage
                        indemnities), Eurodollar illegality and similar
                        provisions.

Governing Law:          State of New York.


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