<PAGE>

                                                                    EXHIBIT 10.6

                                                                  EXECUTION COPY




























                            STOCK PURCHASE AGREEMENT

                                  BY AND AMONG

                            EAGLE TEST SYSTEMS, INC.,

                          THE STOCKHOLDERS NAMED HEREIN

                                       AND

                           THE INVESTORS NAMED HEREIN

                         DATED AS OF SEPTEMBER 30, 2003

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                                      INDEX

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SECTION 1.        PURCHASE AND SALE OF SHARES; REDEMPTION........................................................       2
           1.1    Description of Securities......................................................................       2
           1.2    Sale and Purchase..............................................................................       2
           1.3    Redemption of Stockholders' Stock..............................................................       2
           1.4    Charter; Bylaws; Subordinated Debt.............................................................       2
           1.5    Use of Proceeds................................................................................       3
           1.6    Closing........................................................................................       3
           1.7    Transfer Taxes.................................................................................       3
           1.8    Further Assurances.............................................................................       3
           1.9    Extraordinary Dividend.........................................................................       3

SECTION 2.        REPRESENTATIONS AND WARRANTIES OF THE COMPANY AND THE STOCKHOLDERS.............................       4
           2.1    Organization and Corporate Power...............................................................       5
           2.2    Authorization and Non-Contravention............................................................       5
           2.3    Corporate Records..............................................................................       6
           2.4    Capitalization.................................................................................       6
           2.5    Subsidiaries; Investments......................................................................       8
           2.6    Financial Statements; Projections..............................................................       8
           2.7    Absence of Undisclosed Liabilities.............................................................       9
           2.8    Absence of Certain Developments................................................................       9
           2.9    Accounts Receivable; Accounts Payable; Inventories.............................................      10
           2.10   Transactions with Affiliates...................................................................      11
           2.11   Properties.....................................................................................      11
           2.12   Tax Matters....................................................................................      12
           2.13   Certain Contracts and Arrangements.............................................................      13
           2.14   Intellectual Property..........................................................................      14
           2.15   Litigation.....................................................................................      16
           2.16   Labor Matters..................................................................................      17
           2.17   Permits; Compliance with Laws..................................................................      17
           2.18   Employee Benefit Programs......................................................................      18
           2.19   Insurance Coverage.............................................................................      19
           2.20   Investment Banking; Brokerage..................................................................      19
           2.21   Environmental Matters..........................................................................      19
           2.22   Customers, Distributors and Partners...........................................................      19
           2.23   Suppliers......................................................................................      20
           2.24   Warranty and Related Matters...................................................................      20
           2.25   Illegal Payments...............................................................................      20
           2.26   Solvency.......................................................................................      20
           2.27   Privacy of Customer Information................................................................      20
           2.28   Backlog........................................................................................      21
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           2.29   Health Matters.................................................................................      21
           2.30   Disclosure.....................................................................................      21

SECTION 3.        REPRESENTATIONS AND WARRANTIES OF THE INVESTORS................................................      21
           3.1    Investment Status..............................................................................      21
           3.2    Authority and Non-Contravention................................................................      22

SECTION 4.        CLOSING CONDITIONS AND DELIVERIES..............................................................      22
           4.1    Transactions to Occur Prior to Closing.........................................................      22
           4.2    Authorization..................................................................................      23
           4.3    Approvals, Consents and Waivers................................................................      23
           4.4    Deliveries by the Company and the Stockholders to the Investors................................      23
           4.5    Closing Deliveries by the Investors to the Company.............................................      25
           4.6    Closing Deliveries by the Stockholders to the Company..........................................      25
           4.7    All Proceedings Satisfactory...................................................................      25
           4.8    No Litigation..................................................................................      25
           4.9    No Violation or Injunction.....................................................................      25

SECTION 5.        SURVIVAL OF REPRESENTATIONS AND WARRANTIES; TRANSACTION RELATED INDEMNIFICATION................      26
           5.1    Survival of Representations, Warranties and Covenants..........................................      26
           5.2    Transaction Related Indemnification............................................................      26
           5.3    Limitations on Transaction Related Indemnification.............................................      27
           5.4    Notice; Payment of Losses; Defense of Third-Party Claims.......................................      28
           5.5    Limitation on Contribution and Certain Other Rights............................................      29

SECTION 6.        GENERAL........................................................................................      30
           6.1    Waivers and Consents; Amendments...............................................................      30
           6.2    Legend on Securities...........................................................................      30
           6.3    Governing Law..................................................................................      30
           6.4    Section Headings; Construction.................................................................      30
           6.5    Counterparts...................................................................................      31
           6.6    Notices and Demands............................................................................      31
           6.7    Dispute Resolution.............................................................................      31
           6.8    Consent to Jurisdiction........................................................................      32
           6.9    Remedies; Severability.........................................................................      32
           6.10   Integration....................................................................................      33
           6.11   Assignability; Binding Agreement...............................................................      33
           6.12   Release........................................................................................      33
           6.13   Confidentiality................................................................................      34
           6.14   Expenses.......................................................................................      34
           6.15   Certain Definitions............................................................................      34
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EXHIBITS

         Exhibit A-1 - Schedule of Foxman Stockholders
         Exhibit A-2 - Schedule of Other Stockholders
         Exhibit B - Schedule of Investors
         Exhibit C - Amended and Restated Articles of Incorporation
         Exhibit D - Form of Bylaws
         Exhibit E - Form of Stock Option Plan
         Exhibit F - Form of Stockholders' Agreement
         Exhibit G - Form of Registration Rights Agreement
         Exhibit H - Redemption of Common Stock
         Exhibit I - Management Rights Letter
         Exhibit J - Form of Non-Competition Agreement
         Exhibit K - Form of Employee Agreement
         Exhibit L - Form of Opinion of Counsel
         Exhibit M - Form of Director Indemnification Agreement

DISCLOSURE SCHEDULE

         Section 2.1 - Foreign Qualifications
         Section 2.4 - Capitalization
         Section 2.5 - Subsidiaries and Investments
         Section 2.6 - Financial Statements; Projections
         Section 2.7 - Undisclosed Liabilities
         Section 2.8 - Certain Developments
         Section 2.9 - Inventories
         Section 2.12 - Tax Matters
         Section 2.13 - Material Contracts
         Section 2.14 - Intellectual Property
         Section 2.15 - Litigation
         Section 2.16 - Labor Matters
         Section 2.18 - Employee Benefit Programs
         Section 2.19 - Insurance Coverage
         Section 2.20 - Investment Banking; Brokerage
         Section 2.22 - Customers; Distributors and Partners
         Section 2.24 - Warranty and Related Matters

                                      iii
<PAGE>

                                                                    EXHIBIT 10.6

                            STOCK PURCHASE AGREEMENT

      THIS STOCK PURCHASE AGREEMENT (the "AGREEMENT") is made and entered into
as of September 30, 2003, by and among Eagle Test Systems, Inc., an Illinois
corporation (the "COMPANY"), the shareholders of the Company named in Exhibit
A-1 attached hereto (the "FOXMAN STOCKHOLDERS," and each individually, a "FOXMAN
STOCKHOLDER"), the shareholders of the Company named in Exhibit A-2 attached
hereto (the "OTHER STOCKHOLDERS," and collectively with the Foxman Stockholders,
the "STOCKHOLDERS") and the investment partnerships and other investors named in
Exhibit B attached hereto (each, an "INVESTOR," and, collectively, the
"INVESTORS").

      WHEREAS, the Investors desire to purchase from the Company, and the
Company desires to issue and sell to the Investors, 3,436.099 shares of the
Company's Series A Convertible Preferred Stock, par value $.01 per share (the
"CONVERTIBLE PREFERRED STOCK"), for an aggregate purchase price of $65,000,000;

      WHEREAS, contemporaneously with the Closing (as defined below), TA
Subordinated Debt Fund, L.P. and TA Investors, LLC (the "Lenders") will lend to
the Company $30,000,000 (the "SUBORDINATED DEBT") pursuant to the terms of a
Note Purchase Agreement (the "NOTE PURCHASE AGREEMENT") in return for
convertible subordinated debentures (collectively, the "CONVERTIBLE SUBORDINATED
NOTES") which are convertible into subordinated notes (collectively, the
"SUBORDINATED NOTES") and warrants (the "WARRANTS") to acquire shares of Common
Stock, no par value, of the Company (the "COMMON STOCK");

      WHEREAS, the Company shall use the proceeds from the purchase and sale of
the Convertible Preferred Stock and the Subordinated Debt for the Redemption (as
defined below) and for payment of certain expenses at or immediately subsequent
to the Closing; and

      WHEREAS, in connection with and as a condition precedent to the
consummation of the transactions contemplated hereby, among other things (i) the
Company has amended and restated its articles of incorporation in the form
attached hereto as Exhibit C (the "ARTICLES OF INCORPORATION"), and has amended
and restated its bylaws in the form attached hereto as Exhibit D (the "BYLAWS"),
(ii) the Company has adopted the 2003 Stock Option and Grant Plan in the form
attached hereto as Exhibit E (the "STOCK OPTION PLAN") pursuant to which the
Company has reserved for issuance thereunder 273.516 shares of Common Stock,
(iii) the Company, the Stockholders and the Investors will enter into a
Stockholders Agreement in substantially the form attached hereto as Exhibit F
(the "STOCKHOLDERS AGREEMENT") and (iv) the Company and the Investors will enter
into a Registration Rights Agreement in substantially the form attached hereto
as Exhibit G (the "REGISTRATION RIGHTS AGREEMENT").

      NOW THEREFORE, in consideration of the foregoing and the mutual covenants
and agreements hereinafter set forth, the parties hereto agree as follows:

<PAGE>

SECTION 1. PURCHASE AND SALE OF SHARES; REDEMPTION

      1.1 DESCRIPTION OF SECURITIES. The Company's authorized capital stock
consists of Common Stock and, upon consummation of transactions contemplated by
this Agreement, Convertible Preferred Stock and Redeemable Preferred Stock, par
value $.01 per share ("REDEEMABLE PREFERRED STOCK"). The Common Stock,
Convertible Preferred Stock and Redeemable Preferred Stock will, upon
consummation of transactions contemplated by this Agreement, have the rights,
preferences and other terms set forth in Exhibit C attached hereto. Immediately
prior to the Closing, all of the issued and outstanding equity securities of the
Company are owned beneficially and of record by the shareholders as set forth on
Exhibit A-1 and A-2 attached hereto. For purposes of this Agreement, the shares
of Convertible Preferred Stock to be acquired by the Investors from the Company
hereunder are sometimes referred to as the "CONVERTIBLE PREFERRED SHARES," the
shares of Redeemable Preferred Stock issuable upon conversion of the Convertible
Preferred Stock are referred to as the "PREFERRED CONVERSION SHARES," the shares
of Common Stock issuable upon conversion of the Convertible Preferred Shares are
referred to as the "COMMON CONVERSION SHARES," the Preferred Conversion Shares
and Common Conversion Shares are referred to as the "CONVERSION SHARES," and the
Convertible Preferred Shares, the Preferred Conversion Shares and the Common
Conversion Shares are sometimes referred to herein as the "SECURITIES." The
Company will, upon consummation of transactions contemplated by this Agreement,
have authorized and reserved, and covenants to continue to reserve, a sufficient
number of shares of Common Stock and Redeemable Preferred Stock necessary to
satisfy the rights of conversion of the holders of Convertible Preferred Stock
as set forth in Exhibit C hereto.

      1.2 SALE AND PURCHASE. Upon the terms and subject to the conditions
herein, and in reliance on the representations and warranties made by the
Company and the Stockholders herein, each of the Investors, severally but not
jointly, hereby agrees to purchase from the Company, and the Company hereby
agrees to issue and sell to each of the Investors, the number of Convertible
Preferred Shares set forth opposite the name of each such Investor on Exhibit B
hereto, free and clear of any and all Claims (as defined herein), for a total
aggregate purchase price of $65,000,000 (the "PURCHASE PRICE"), and the Company
hereby grants the Investors the rights set forth herein and in the agreements
referred to herein.

      1.3 REDEMPTION OF STOCKHOLDERS' STOCK. At and concurrently with the
Closing, and following the purchase and sale of the Convertible Preferred Shares
as provided herein, and upon the terms and subject to the conditions herein, and
in reliance on the representations and warranties made by the Company and the
Stockholders to the Investors herein, the Company shall redeem, and the
Stockholders, severally but not jointly, hereby agree to sell, transfer and
convey to the Company, the number of shares of Common Stock (the "REDEMPTION")
set forth opposite the name of such Stockholder on Exhibit H attached hereto, in
each case for the redemption price set forth opposite such Stockholder's name on
Exhibit H attached hereto, for an aggregate redemption price of $95,000,000 (the
"REDEMPTION PRICE") payable by wire transfer of immediately available funds.

      1.4 CHARTER; BYLAWS; SUBORDINATED DEBT. Immediately prior to or
contemporaneously with the Closing, the Company shall have (a) filed with the
Secretary of

                                      -2-
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State of Illinois the Articles of Incorporation, and the same shall have become
effective in accordance with Illinois law, (b) adopted the Bylaws and Stock
Option Plan, (c) executed and delivered the Note Purchase Agreement and the
Subordinated Notes to the Lenders for which it shall receive proceeds of
$30,000,000.

      1.5 USE OF PROCEEDS. The Company shall apply the proceeds from the sale of
the Convertible Preferred Shares and the Subordinated Debt to the Redemption.

      1.6 CLOSING. The closing of the purchase and sale of the Convertible
Preferred Shares (the "CLOSING") shall take place at a mutually agreeable
location on the date hereof (the "CLOSING DATE"), and promptly following the
Closing and on the same day, the closing of the Redemption shall occur. At the
Closing, the Company shall deliver or cause to be delivered to each of the
Investors stock certificates representing all of the Convertible Preferred
Shares issued hereunder, free and clear of any and all liens, claims, options,
charges, pledges, security interests, deeds of trust, voting agreements (except
as provided herein), voting trusts, encumbrances, rights or restrictions of any
nature ("CLAIMS"), and the Company shall apply the proceeds of the purchase and
sale of the Convertible Preferred Stock and the Subordinated Debt to the
Redemption. At the closing of the Redemption, the Stockholders agree with the
Company and the Investors that they shall transfer to the Company the shares of
Common Stock to be redeemed hereunder free and clear of all Claims and the
Company shall pay to the Stockholders the redemption price for such shares. All
cash payments hereunder shall be made by wire transfer of same day available
funds.

      1.7 TRANSFER TAXES. All transfer taxes, fees and duties under applicable
law incurred in connection with the sale and transfer of the Convertible
Preferred Shares under this Agreement will be borne and paid by the Company and
it shall promptly reimburse the Investors for any such tax, fee or duty which
any of them is required to pay under applicable law.

      1.8 FURTHER ASSURANCES. The Stockholders, the Company, and the Investors
from time to time after the Closing at the request of any other party hereto and
without further consideration shall execute and deliver further instruments of
transfer and assignment and take such other action as a party may reasonably
require to more effectively transfer and assign to, and vest in, the Investors,
the Securities and all rights thereto, and to fully implement the provisions of
this Agreement.

      1.9 EXTRAORDINARY DIVIDEND.

            (a) The Company shall prepare in good faith and deliver to the
Investors at Closing a statement setting forth the Company's determination of
its cash and cash equivalents as of the Closing (the "Estimated Cash Amount").
Immediately prior to the Closing, the Company made an extraordinary cash
dividend in the aggregate amount of $13,500,000 to the Stockholders (on a
pro-rata basis based on their relative holdings of Common Stock as of
immediately prior to the Closing), which amount is equal to ninety percent (90%)
of the positive difference between the Estimated Cash Amount and $20,000,000
(the "Extraordinary Dividend"). For purposes of Section 1.9(c) below, the term
"Dividend Holdback Amount" shall mean an amount equal to $1,500,000, which
amount equals ten percent (10%) of the positive difference between the Estimated
Cash Amount and $20,000,000.

                                      -3-
<PAGE>

            (b) As soon as practicable after the Closing, the Company shall
deliver to the Investors a balance sheet for the Company as of the Closing Date
which shall be prepared in accordance with generally accepted accounting
principles of the United States (except as set forth in Section 2.6 of the
Disclosure Schedule) applied on a consistent basis (the "Final Closing Date
Balance Sheet") and a statement based on such Final Closing Date Balance Sheet
setting forth the Company's determination of its cash and cash equivalents as of
the Closing Date (the "Final Cash Amount"),

            (c) Subject to subsection (d) below, on the later of (i) the date
which is thirty (30) days after the Closing Date and (ii) the date which is
seven (7) days after the delivery of the Final Closing Date Balance Sheet by the
Company to the Investors, the Company and the Investors shall reconcile the
extraordinary dividend amount as set forth below in this subsection (c). In the
event that the Final Cash Amount is greater than the Estimated Cash Amount (the
positive difference being the "Excess Cash Amount"), then the Company shall
within five (5) business days of such determination make a cash payment to the
Stockholders (on a pro-rata basis based on their relative holdings of Common
Stock as of immediately prior to the Closing) equal to the sum of the Dividend
Holdback Amount and the Excess Cash Amount. In the event that the Final Cash
Amount is equal to the Estimated Cash Amount, then the Company shall within five
(5) business days of such determination make a cash payment to the Stockholders
(on a pro-rata basis based on their relative holdings of Common Stock as of
immediately prior to the Closing) equal to the Dividend Holdback Amount. In the
event that the Final Cash Amount is less than the Estimated Cash Amount (the
negative difference being the "Cash Shortfall Amount"), then the Company shall
within five (5) business days of such determination make a cash payment to the
Stockholders (on a pro-rata basis based on their relative holdings of Common
Stock as of immediately prior to the Closing) equal to the positive difference
between the Dividend Holdback Amount and the Cash Shortfall Amount; provided,
however, in the event that the Cash Shortfall Amount exceeds the Dividend
Holdback Amount, each of the Stockholders (on a pro-rata basis based on their
relative holdings of Common Stock as of immediately prior to the Closing) hereby
agrees to promptly pay the Company an amount equal to the difference between the
Cash Shortfall Amount and the Dividend Holdback Amount.

            (d) Notwithstanding the above, in the event that the Investors do
not agree on the Final Closing Date Balance Sheet or the Final Cash Amount
prepared by the Company, any disputes shall be resolved by an independent Big 4
accounting firm (the "Accountant"). The final determination by the Accountant of
the Final Closing Date Balance Sheet and Final Cash Amount shall (i) be made no
later than thirty (30) days following retention of such firm by the parties,
(ii) be set forth in writing, (iii) be conclusive and binding upon the parties,
(iv) not be subject to dispute or review and (v) be the final determination of
such matters. The Company shall pay the fees and expenses of such accounting
firm.

SECTION 2. REPRESENTATIONS AND WARRANTIES OF THE COMPANY AND THE STOCKHOLDERS

      In order to induce the Investors to enter into this Agreement and
consummate the transactions contemplated hereby, the Company and the Foxman
Stockholders, on a joint and

                                      -4-
<PAGE>

several basis, hereby make to the Investors the representations and warranties
contained in this Section 2; provided that the representations and warranties
set forth in Sections 2.2(b) and 2.4(b) are made solely by each Stockholder
severally and not jointly. Such representations and warranties are subject to
the qualifications and exceptions set forth in the disclosure schedule delivered
to the Investors pursuant to this Agreement (the "DISCLOSURE SCHEDULE"). For
purposes hereof unless otherwise indicated, all references to the Company shall
include all Subsidiaries (as defined herein) of the Company and predecessors, if
any. References to the knowledge or awareness of the Company are deemed to mean
the actual knowledge of the officers of the Company and the Foxman Stockholders
after due inquiry.

      2.1 ORGANIZATION AND CORPORATE POWER. The Company is a corporation duly
organized, validly existing and in good standing under the laws of Illinois, and
is duly qualified or registered to do business as a foreign corporation (a) in
each jurisdiction listed in Section 2.1 of the Disclosure Schedule and (b) in
each jurisdiction in which the failure to be so duly qualified or registered has
had, or could have, a material adverse effect on the assets, liabilities,
condition (financial or other), business or results of operations of the Company
(a "MATERIAL ADVERSE EFFECT"). The Company has all required corporate power and
authority to carry on its business as presently conducted, to enter into and
perform this Agreement and the agreements contemplated hereby to which it is a
party and to carry out the transactions contemplated hereby and thereby,
including the issuance of the Securities. The copies of the Articles of
Incorporation, as amended as of the Closing Date and certified by the Secretary
of State of Illinois, and the Bylaws, as amended as of the Closing Date and
certified by the Secretary of the Company, have been furnished to the Investors
by the Company, are correct and complete as of the date hereof, and the Company
is not in violation of any term of its Articles of Incorporation or Bylaws.

      2.2 AUTHORIZATION AND NON-CONTRAVENTION.

            (a) This Agreement and all agreements, documents and instruments
executed and delivered by the Company pursuant hereto are valid and binding
obligations of the Company, enforceable in accordance with their respective
terms, except: (x) as limited by applicable bankruptcy, insolvency,
reorganization, moratorium and other laws of general application affecting
enforcement of creditors' rights generally and (y) as limited by laws relating
to the availability of specific performance, injunctive relief or other
equitable remedies. The execution, delivery and performance of this Agreement
and all agreements, documents and instruments executed and delivered by the
Company pursuant hereto, the issuance and delivery of the Convertible Preferred
Shares, and, upon conversion of the Convertible Preferred Shares, the issuance
and delivery of the Conversion Shares, have been duly authorized by all
necessary corporate or other action of the Company. The execution and delivery
of this Agreement and all agreements, documents and instruments executed and
delivered by the Company pursuant hereto, the issuance and delivery of the
Convertible Preferred Shares, and, upon conversion of the Convertible Preferred
Shares, the issuance and delivery of the Conversion Shares and the performance
of the transactions contemplated by this Agreement and such other agreements,
documents and instruments, do not and will not: (i) violate or result in a
violation of, conflict with or constitute or result in a violation of or default
(whether after the giving of notice, lapse of time or both) under any contract
or obligation to which the Company is a party or by which its assets are bound,
or any provision of the Articles of Incorporation or Bylaws, or cause the

                                      -5-
<PAGE>

creation of any Claim upon any of the assets of the Company; (ii) violate,
conflict with or result in a violation of, or constitute a default (whether
after the giving of notice, lapse of time or both) under, any provision of any
law, regulation or rule, or any order of, or any restriction imposed by, any
court or governmental agency applicable to the Company; (iii) based, and in
reliance, upon the accuracy of the Investors' representations and warranties set
forth in Section 3.3, require from the Company any notice to, declaration or
filing with, or consent or approval of any governmental authority or other third
party; or (iv) violate or result in a violation of, or constitute a default
(whether after the giving of notice, lapse of time or both) under, accelerate
any obligation under, or give rise to a right of termination of, any agreement,
permit, license or authorization to which the Company is a party or by which the
Company is bound.

            (b) This Agreement and all agreements, documents and instruments
executed and delivered by any Stockholder pursuant hereto are valid and binding
obligations of such Stockholder enforceable in accordance with their respective
terms, except: (x) as limited by applicable bankruptcy, insolvency,
reorganization, moratorium and other laws of general application affecting
enforcement of creditors' rights generally and (y) as limited by laws relating
to the availability of specific performance, injunctive relief or other
equitable remedies. Each Stockholder has full right, authority, power and
capacity to enter into this Agreement and all agreements, documents and
instruments executed and delivered by such Stockholder pursuant hereto and to
carry out the transactions contemplated hereby and thereby. The execution,
delivery and performance by each Stockholder of this Agreement and all
agreements, documents and instruments executed and delivered by such Stockholder
pursuant hereto and the performance of the transactions contemplated by this
Agreement and such other agreements, documents and instruments do not and will
not: (i) violate or result in a violation of, conflict with or constitute or
result in a violation of or default (whether after the giving of notice, lapse
of time or both) under, accelerate any obligation under, or give rise to a right
of termination of, any contract, agreement, obligation, permit, license or
authorization to which the Company or such Stockholder is a party or by which
any of them or their respective assets are bound, or any provision of such
Stockholder's organizational documents, if applicable; (ii) violate or result in
a violation of, or constitute a default (whether after the giving of notice,
lapse of time or both) under, any provision of any law, regulation or rule, or
any order of, or any restriction imposed by, any court or governmental agency
applicable to the Company or such Stockholder; (iii) require from the Company or
such Stockholder any notice to, declaration or filing with, or consent or
approval of, any governmental authority or other third party, or (iv) violate or
result in a violation of, or constitute a default (whether after the giving of
notice, lapse of time or both) under, accelerate any obligation under, or give
rise to a right of termination of, any agreement, permit, license or
authorization to which the Company or such Stockholder is a party or by which
the Company or such Stockholder is bound.

      2.3 CORPORATE RECORDS. The corporate record books of the Company
accurately reflect all corporate action taken by its shareholders and board of
directors and committees. The copies of the corporate records of the Company, as
delivered to the Investors, are true and complete copies of the originals of
such documents.

      2.4 CAPITALIZATION.

                                      -6-
<PAGE>

            (a) Immediately prior to giving effect to the transactions
contemplated hereby, the authorized capital stock of the Company consisted of
(i) 8,000 shares of Common Stock of which 5,756 shares were issued and
outstanding, (ii) 3,437 shares of Convertible Preferred Stock, of which no
shares were issued and outstanding and (iii) 3,437 shares of Redeemable
Preferred Stock, of which no shares were issued and outstanding. As of the
Closing and after giving effect to the transactions contemplated hereby, the
authorized capital stock of the Company consists of (i) 8,000 shares of Common
Stock, of which 2,158.500 shares are issued and outstanding, (ii) 3,437 shares
of Convertible Preferred Stock, of which 3,436.099 shares are issued and
outstanding and (iii) 3,437 shares of Redeemable Preferred Stock, of which no
shares are issued and outstanding. The relative rights, preferences and other
provisions relating to the Convertible Preferred Stock, the Redeemable Preferred
Stock and the Common Stock are as set forth in the Articles of Incorporation,
and such rights and preferences are valid and enforceable in accordance with
their terms under the laws of the State of Illinois. Except as contemplated by
the Transaction Documents, there are no outstanding subscriptions, options,
warrants, commitments, preemptive rights, agreements, arrangements or
commitments of any kind relating to the issuance or sale of, or outstanding
securities convertible into or exercisable or exchangeable for, any shares of
capital stock of any class or other equity interests of the Company. Except as
provided herein, the Company has no obligation to purchase, redeem, or otherwise
acquire any of its capital stock or any interests therein, and has not redeemed
any shares of its capital stock in the past three (3) years. As of the Closing,
and after giving effect to the transactions contemplated hereby, all of the
outstanding shares of capital stock of the Company will have been duly and
validly authorized and issued, fully paid and non-assessable, and will have been
offered, issued, sold and delivered in compliance with applicable federal and
state securities laws without giving rise to preemptive rights of any kind. The
Company has duly and validly authorized and reserved (A) 273.516 shares of
Common Stock (subject to adjustment) for issuance in connection with awards
granted or exercised under the Stock Option Plan, (B) 3,436.099 shares of Common
Stock and 3,436.099 shares of Redeemable Preferred Stock (subject to
adjustment), all for issuance upon conversion of the Convertible Preferred
Stock, and (C) 210.016 shares of Common Stock (subject to adjustment) for
issuance upon exercise of the Warrants, and the shares of Common Stock so issued
will, upon such grant, exercise or conversion, be validly issued, fully paid and
non-assessable. As of the Closing, and after giving effect to the transactions
contemplated hereby, other than rights set forth herein or in the Articles of
Incorporation, the Registration Rights Agreement or the Stockholders' Agreement,
there are (1) no preemptive rights, rights of first refusal, put or call rights
or obligations or anti-dilution rights with respect to the issuance, sale or
redemption of the Company's capital stock or any interests therein, (2) no
rights to have the Company's capital stock registered for sale to the public in
connection with the laws of any jurisdiction and (3) no documents, instruments
or agreements relating to the voting of the Company's voting securities or
restrictions on the transfer of the Company's capital stock.

            (b) Immediately prior to the Closing, the Stockholders are the sole
record and beneficial owners of the shares of Common Stock set forth opposite
their names on Exhibit A attached hereto, free and clear of any Claims including
Claims of spouses, former spouses and other family members. After giving effect
to the transactions contemplated hereby, the Common Stock and the Convertible
Preferred Stock will be held as set forth on Section 2.4(b) of the

                                      -7-
<PAGE>

Disclosure Schedule free and clear of any Claims (other than restrictions
imposed by securities laws applicable to unregistered securities generally).

      2.5 SUBSIDIARIES; INVESTMENTS. The Company does not own or control,
directly or indirectly, any interest in any other corporation, partnership,
limited liability company, association or other business entity, except as set
forth in Section 2.5 of the Disclosure Schedule. The Company has not made any
investment and does not hold any interest in or have any outstanding loan or
advance to or from, any person, including, without limitation, any officer,
director or stockholder of the Company.

      2.6 FINANCIAL STATEMENTS; PROJECTIONS.

            (a) The Company has previously furnished to the Investors and
attached hereto on Section 2.6(a) of the Disclosure Schedule copies of the
following financial statements: (i) the Company's balance sheets for the fiscal
years ended September 30, 2002 (the "BASE BALANCE SHEET") , September 30, 2001
and September 30, 2000 and the related statements of income, for the fiscal
years then ended, and (ii) the Company's unaudited balance sheet as of August
31, 2003 and the related unaudited statements of income, for the eleven-month
period then ended. Subject to Section 2.6(a) of the Disclosure Schedule such
financial statements were prepared in conformity with generally accepted
accounting principles of the United States applied on a consistent basis, are
consistent in all material respects with the books and records of the Company
and fairly present the financial position of the Company as of the dates thereof
and the results of operations and cash flows of the Company for the periods
shown therein. The Company has not entered into any transactions involving the
factoring of receivables, synthetic leases, off balance sheet research and
development arrangements or the use of special purpose entities for any off
balance sheet activity. Except as set forth in Section 2.6 of the Disclosure
Schedule, the Company's revenue recognition policies and the application of
those policies are in compliance with applicable standards under generally
accepted accounting principles of the United States applied on a consistent
basis. Nothing has come to the attention of the Company or the Foxman
Stockholders since such respective dates that would indicate that such financial
statements are not true and correct in all material respects as of the date
thereof.

            (b) The projections delivered to the Investors at Closing represent
good faith estimates of the performance of the Company for the periods stated
therein based upon assumptions that were believed in good faith to be reasonable
when made and continue to be reasonable as of the date hereof; provided however,
that the foregoing is not a guarantee that such projections will be achieved.

            (c) As of immediately prior to the Closing and prior to giving
effect to the transactions contemplated hereby, the Company has at least $20
million in cash and cash equivalents.

            (d) The Company's net working capital as of the Closing and prior to
giving effect to the transactions contemplated hereby is not materially
different from the net working capital of the Company as of July 31, 2003
(except as reduced by the Extraordinary Dividend (including any post closing
adjustments thereto)). Since the date of the Base Balance Sheet, the Company has
paid its accounts payable in the ordinary course of its business and in a manner

                                      -8-
<PAGE>

that is consistent with its past practices. Since the date of the Base Balance
Sheet, the Company has collected its accounts receivable in the ordinary course
of its business and in a manner that is consistent with past practices and has
not accelerated any such collections.

      2.7 ABSENCE OF UNDISCLOSED LIABILITIES. The Company does not have any
material liabilities or obligations of any nature, whether accrued, absolute,
contingent, asserted, unasserted or otherwise, except liabilities or obligations
(i) stated or adequately reserved against in the Base Balance Sheet, (ii)
incurred as a result of or arising out of the transactions contemplated under
this Agreement, or (iii) incurred in the ordinary course of business since the
date of the Base Balance Sheet.

      2.8 ABSENCE OF CERTAIN DEVELOPMENTS. Since the date of the Base Balance
Sheet, the Company has conducted its business only in the ordinary course
consistent with past practice and, except with respect to the Extraordinary
Dividend or as set forth in Section 2.8 of the Disclosure Schedule, there has
not been:

            (a) any change in the assets, liabilities, condition (financial or
other), properties, business or operations of the Company, which change by
itself or in conjunction with all other such changes, whether or not arising in
the ordinary course of business, has had or could be reasonably likely to have a
Material Adverse Effect;

            (b) any mortgage, lien or other encumbrance placed on any of the
properties of the Company, other than purchase money liens and liens for taxes
not yet due and payable;

            (c) any purchase, sale or other disposition, or any agreement or
other arrangement for the purchase, sale or other disposition, of any properties
or assets by the Company, including any of its Intellectual Property Assets (as
defined below), involving the payment or receipt of more than $100,000 other
than sales of goods and services by the Company in the ordinary course of
business;

            (d) any damage, destruction or loss, whether or not covered by
insurance, that has had or could be reasonably likely to have a Material Adverse
Effect;

            (e) except for the Redemption, any declaration, setting aside or
payment of any dividend by the Company, or the making of any other distribution
in respect of the capital stock of the Company, or any direct or indirect
redemption, purchase or other acquisition by the Company of its own capital
stock;

            (f) any labor trouble or claim of unfair labor practices involving
the Company, any change in the compensation payable or to become payable by the
Company to any of its officers or employees other than normal merit increases to
such employees in accordance with its usual practices, or any bonus payment or
arrangement made to or with any of such officers or employees or any
establishment or creation of any employment, deferred compensation or severance
arrangement or employee benefit plan other than the Stock Option Plan with
respect to such persons or the amendment of any of the foregoing;

                                      -9-
<PAGE>

            (g) any resignation, termination or removal of any officer of the
Company or material loss of personnel of the Company or material change in the
terms and conditions of the employment of the Company's officers or key
personnel;

            (h) any payment or discharge of a material lien or liability of the
Company that was not shown on the audited balance sheet of the Company as of the
date of the Base Balance Sheet or incurred in the ordinary course of business
thereafter;

            (i) any contingent liability incurred by the Company as guarantor or
otherwise with respect to the obligations of others or any cancellation of any
material debt or claim owing to, or waiver of any material right of, the
Company, including any write-off or compromise of any accounts receivable other
than write-offs or compromises of accounts receivable that are in the ordinary
course of business in amounts consistent with past practice;

            (j) any obligation or liability incurred by the Company to any of
its officers, directors, shareholders or employees, or any loans or advances
made by the Company to any of its officers, directors, shareholders or
employees, except normal compensation and expense allowances payable to officers
or employees in the ordinary course of business;

            (k) any change in accounting methods or practices, collection
policies, pricing policies or payment policies of the Company;

            (l) any loss, or any known development that could reasonably be
expected to result in a loss, of any significant supplier, customer, distributor
or account of the Company;

            (m) any amendment or termination of any material contract or
agreement to which the Company is a party or by which it is bound;

            (n) any arrangements relating to any royalty or similar payment
based on the revenues, profits or sales volume of the Company, whether as part
of the terms of the Company's capital stock or by any separate agreement;

            (o) any transaction or agreement involving fixed price terms or
fixed volume arrangements;

            (p) any other transaction entered into by the Company other than
transactions in the ordinary course of business;

            (q) except as provided in this Agreement, any amendment to the
Company's articles of incorporation or by-laws;

            (r) any agreement or understanding whether in writing or otherwise,
for the Company to take any of the actions specified in paragraphs (a) through
(q) above.

      2.9 ACCOUNTS RECEIVABLE; ACCOUNTS PAYABLE; INVENTORIES.

            (a) All of the accounts receivable of the Company are valid claims,
subject to no set-off or counterclaim, and, to its knowledge, fully collectible
in the normal course of

                                      -10-
<PAGE>

business; provided, however, that the foregoing is not a guarantee that such
accounts receivable will be fully collected. The reserve for doubtful accounts
stated in the Base Balance Sheet is in accordance with generally accepted
accounting principles of the United States and is believed in good faith to be
reasonable and appropriate. The Company does not have any accounts receivable or
loans receivable from any person with whom it is affiliated or any of its
directors, officers, employees or shareholders.

            (b) All accounts payable and notes payable of the Company arose in
bona fide arm's length transactions in the ordinary course of business and no
such account payable or note payable is delinquent in its payment, except for
such account payable or note payable that is subject to a bona fide dispute or
payment arrangement. The Company has no account payable to any person with whom
it is affiliated or any of its directors, officers, employees or shareholders.

            (c) The values of the inventories stated in the Base Balance Sheet
reflect the normal inventory valuation policies of the Company and were
determined in accordance with generally accepted accounting principles of the
United States, consistently applied. Any inventory writedowns have been done in
the ordinary course of business consistent with the Company's historical
inventory practices. Purchase commitments for raw materials and parts are not in
excess of normal requirements and none are at prices materially in excess of
current market prices. All of the Company's inventory items are of a quality and
quantity salable in the ordinary course of its business at profit margins
consistent with the Company's experience in prior years, taking into account
fluctuations and trends in the market in which its goods and services are sold.
Since the date of the Base Balance Sheet, no inventory items have been sold or
disposed of except through sales in the ordinary course of business at profit
margins consistent with the Company's experience in prior years taking into
account fluctuations and trends in the market in which its goods and services
are sold, and all sales commitments made for the Company's products are at
prices not less than inventory values plus selling expenses and said profit
margins.

      2.10 TRANSACTIONS WITH AFFILIATES. There are no loans, leases or other
agreements or transactions between the Company or any present or former
shareholder, director, officer or employee of the Company, or to the knowledge
of the Company, any member of such officer's, director's, employee's or
stockholder's immediate family, or any person controlled by such officer,
director, employee or stockholder or his or her immediate family. No
shareholder, director, officer or employee of the Company, or to the knowledge
of the Company any of their respective spouses or family members, owns directly
or indirectly, on an individual or joint basis, any interest in, or serves as an
officer or director or in another similar capacity of, any competitor, customer
or supplier of the Company, or any organization which has a material contract or
arrangement with the Company.

      2.11 PROPERTIES. The Company has good, valid and (if applicable)
marketable title to all assets material to its business and to those assets
reflected on the Base Balance Sheet or acquired by it after the date thereof
(except for properties disposed of since that date in the ordinary course of
business), free and clear of Claims, except for liens for Taxes (as hereinafter
defined) not yet due and payable, and minor liens and encumbrances that do not
materially detract from the value of the property subject thereto or impair the
operations of the Company. All equipment included in such properties that is
necessary to the business of the Company is in

                                      -11-
<PAGE>

good condition and repair (ordinary wear and tear excepted) and all leases of
real or personal property to which the Company is a party are fully effective
and afford the Company peaceful and undisturbed possession of the subject matter
to the lease. The property and assets of the Company are sufficient for the
conduct of its business as presently conducted.

      2.12 TAX MATTERS.

            (a) The Company has timely and properly filed all federal, state,
local and foreign tax returns required to be filed by it through the date
hereof, and all such tax returns filed by the Company are true, correct and
complete in all material respects. The Company has paid or caused to be paid all
material federal, state, local, foreign and other taxes, including without
limitation, income taxes, estimated taxes, alternative minimum taxes, excise
taxes, sales taxes, franchise taxes, employment and payroll related taxes,
withholding taxes, transfer taxes, and all deficiencies, or other additions to
tax, interest, fines and penalties owed by it (collectively, "TAXES"), required
to be paid by it through the date hereof whether disputed or not, except Taxes
that have not yet accrued or the payment for which has not otherwise become due.
The provisions for payment of any accrued and unpaid Taxes of the Company in the
Base Balance Sheet are sufficient as of its date for the payment of any accrued
and unpaid Taxes of any nature of the Company, and since the date of the Base
Balance Sheet the Company has incurred no Taxes other than in the ordinary
course of its business. All Taxes and other assessments and levies that the
Company was or is required to withhold or collect have been withheld and
collected and have been paid over to the proper governmental authorities. The
Company has delivered to the Investors correct and complete copies of all annual
tax returns, examination reports, and statements of deficiencies filed by,
assessed against, or agreed to by the Company since December 31, 1995. The
Company has not waived any statute of limitations in respect of Taxes or agreed
to any extension of time with respect to any Tax payment, assessment, deficiency
or collection. Except as set forth in Section 2.12 of the Disclosure Schedule:
(i) the Company has never received notice of any audit or of any proposed
deficiencies from the Internal Revenue Service (the "IRS") or any other taxing
authority (other than routine audits undertaken in the ordinary course and which
have been resolved on or prior to the date hereof); (ii) there are in effect no
waivers of applicable statutes of limitations or agreements as to any extension
of time with respect to any Tax payment, assessment, deficiency or collection.
with respect to any Taxes owed by the Company for any year; (iii) neither the
IRS nor any other taxing authority is now asserting or, to the knowledge of the
Company, threatening to assert against the Company any deficiency or claim for
additional Taxes or interest thereon or penalties in connection therewith; (iv)
the Company has never been a member of an affiliated group of corporations
filing a combined federal income Tax return nor does the Company have any
liability for Taxes of any other Person under Treasury Regulations Section
1.1502-6 (or any similar provision of foreign, state or local law) or otherwise;
and (v) the Company has not filed a consent under Section 341(f) of the Internal
Revenue Code of 1986, as amended (the "CODE"), concerning collapsible
corporations. The Company has never been a United States real property holding
corporation within the meaning of Section 897(c)(2) of the Code during the
applicable period specified in Section 897(c)(1)(A)(ii) of the Code. The Company
is not a party to any Tax allocation or sharing arrangement. The Company is not
a party to any contract, agreement, plan or arrangement covering any employee or
former employee thereof, that, individually or collectively, could give rise to
the payment of any amount that would not be deductible pursuant

                                      -12-
<PAGE>

to Section 280G or Section 162 of the Code. The Company is not a "FOREIGN
PERSON" within the meaning of Section 1445 of the Code and Treasury Regulations
Section 1.1445-2.

            (b) The taxable year of the Company for federal and state income tax
purposes is the fiscal year ended December 31st.

            (c) The Company has never been (i) a passive foreign investment
company, (ii) a foreign personal holding company, (iii) a foreign sales
corporation, (iv) a foreign investment company or (v) a person other than a
United States person, each within the meaning of the Code.

      2.13 CERTAIN CONTRACTS AND ARRANGEMENTS. Except as set forth in Section
2.13 of the Disclosure Schedule (with true and correct copies of each agreement
referred to therein provided to the Investors) or as contemplated by this
Agreement, the Company is not a party or subject to or bound by:

            (a) any contract or agreement involving a potential commitment or
payment by the Company in excess of $100,000;

            (b) any contract, lease or agreement that is not cancelable by the
Company without penalty on not less than ninety (90) days notice;

            (c) any contract containing covenants directly or explicitly
limiting in any respect the freedom of the Company to compete in any line of
business or with any person or entity;

            (d) any contract or agreement relating to the licensing,
distribution, development, purchase, sale or servicing of its software or
hardware products except in the ordinary course of business consistent with past
practices or any of its Intellectual Property Assets;

            (e) any indenture, mortgage, promissory note, loan agreement,
guaranty or other agreement or commitment for borrowing or any pledge or
security arrangement;

            (f) any stock redemption or purchase agreements or other agreements
affecting or relating to the capital stock of the Company, including, without
limitation, any agreement with any shareholder of the Company which includes
anti-dilution rights, registration rights, voting arrangements, operating
covenants or similar provisions;

            (g) any pension, profit sharing, retirement or stock option plans;

            (h) any royalty, dividend or similar arrangement based on the
revenues or profits of the Company or any contract or agreement involving fixed
price or fixed volume arrangements;

            (i) any joint venture, partnership, manufacturer, development or
supply agreement or other agreement that involves a sharing of revenues,
profits, losses, costs or liabilities by the Company with any other Person;

                                      -13-
<PAGE>

            (j) any acquisition, merger or similar agreement;

            (k) any collective bargaining agreement or other agreement with any
labor union or other employee representative of a group of employees;

            (l) any contract with any governmental or quasi governmental entity;

            (m) any contract not executed in the ordinary course of business; or

            (n) any other material contract.

      All such contracts, agreements, leases and instruments are valid and are
in full force and effect and constitute legal, valid and binding obligations of
the Company and, to the knowledge of the Company, of the other parties thereto,
and are enforceable in accordance with their respective terms, except: (x) as
limited by applicable bankruptcy, insolvency, reorganization, moratorium and
other laws of general application affecting enforcement of creditors' rights
generally and (y) as limited by laws relating to the availability of specific
performance, injunctive relief or other equitable remedies. The Company has no
knowledge of any notice or threat to terminate any such contracts, agreements,
leases or instruments, which termination could reasonably be expected to have a
Material Adverse Effect. Neither the Company nor, to the knowledge of the
Company, any other party is in default in complying with any provisions of any
such contract, agreement, lease or instrument, or any other contract, agreement,
lease or instrument, the breach of which could reasonably be expected to have a
Material Adverse Effect, and no condition or event or fact exists which, with
notice, lapse of time or both, could constitute a default thereunder on the part
of the Company, except for any such default, condition, event or fact that,
individually or in the aggregate, that could not reasonably be expected to have
a Material Adverse Effect.

      2.14 INTELLECTUAL PROPERTY.

      (a) Section 2.14 of the Disclosure Schedule contains a complete and
accurate list of all Patents owned by the Company or otherwise used in the
Business ("Company Patents"), Marks owned by the Company or otherwise used in
the Business ("Company Marks") and Copyrights owned by the Company or otherwise
used in and, in either case, material to the Business ("Company Copyrights").
Except as set forth on Section 2.14 of the Disclosure Schedule:

                  (i) the Company exclusively owns or possesses adequate and
      enforceable rights to use, without payment to a third party, all of the
      Intellectual Property Assets necessary for the operation of the Business,
      free and clear of all mortgages, pledges, charges, liens, equities,
      security interests, or other encumbrances or similar agreements;

                  (ii) all Company Patents, Company Marks and Company Copyrights
      that are issued by or registered with, as applicable, the United States
      Patent and Trademark Office, the United States Copyright Office or in any
      similar office or agency anywhere in the world are currently in compliance
      with formal legal requirements

                                      -14-
<PAGE>

      (including without limitation, as applicable, payment of filing,
      examination and maintenance fees, proofs of working or use, timely
      post-registration filing of affidavits of use and incontestability and
      renewal applications) and are valid and enforceable;

                  (iii) there are no pending, or, to the Company's knowledge
      threatened claims against the Company or any of its employees alleging
      that any of the Company Intellectual Property Assets or the Business,
      infringes or conflicts with the rights of others under any Intellectual
      Property Assets ("THIRD PARTY RIGHTS");

                  (iv) to the Company's knowledge, neither the Business nor any
      Company Intellectual Property Asset infringes or conflicts with any Third
      Party Right;

                  (v) the Company has not received any communications alleging
      that the Company has violated or, by conducting the Business, would
      violate any Third Party Rights or that any of the Company Intellectual
      Property Assets is invalid or unenforceable;

                  (vi) no current or former employee or consultant of the
      Company owns any rights in or to any of the Company Intellectual Property
      Assets;

                  (vii) the Company is not aware of any violation or
      infringement by a third party of any of the Company Intellectual Property
      Assets;

                  (viii) the Company has taken reasonable security measures to
      protect the secrecy, confidentiality and value of all Trade Secrets used
      in the Business (the "Company Trade Secrets"), including, without
      limitation, requiring all Company employees and consultants and all other
      persons with access to Company Trade Secrets to execute a binding
      confidentiality agreement, copies or forms of which have been provided to
      the Investors and, to the Company's knowledge, there has not been any
      breach by any party to such confidentiality agreements;

                  (ix) (A) the Company has not directly or indirectly granted
      any rights, licenses or interests in the source code of the Products, and
      (B) since the Company developed the source code of the Products, the
      Company has not provided or disclosed the source code of the Products to
      any person or entity;

                  (x) in the ordinary course of business, the Products perform
      in accordance with their documented specifications and as Company has
      warranted to its customers;

                  (xi) in the ordinary course of business, the Products do not
      contain any "viruses", "time-bombs", "key-locks", or any other devices
      created that could disrupt or interfere with the operation of the Products
      or the integrity of the data, information or signals they produce in a
      manner adverse to the Company or any licensee or recipient; and

                                      -15-
<PAGE>

                  (xii) the Company has (A) not unlawfully collected any
      personally identifiable information from any third parties and (B)
      complied with all applicable regulations relating to the collection,
      storage and onward transfer of all personally identifiable information
      collected by the Company or by third parties having authorized access to
      Company's databases or other records.

            (b) For purposes of this Agreement,

                  (i) "Business" means the business of the Company as currently
      conducted and proposed to be conducted.

                  (ii) "Company Intellectual Property Assets" means all
      Intellectual Property Assets owned by the Company or used in the Business.
      "Company Intellectual Property Assets" includes, without limitation, the
      Products, Company Patents, Company Marks, Company Copyrights and Company
      Trade Secrets.

                  (iii) "Intellectual Property Assets" means:

                        (A) patents, patent applications, patent rights, and
            inventions and discoveries and invention disclosures (whether or not
            patented) (collectively, "Patents");

                        (B) trade names, trade dress, logos, packaging design,
            slogans, Internet domain names, registered and unregistered
            trademarks and service marks and related registrations and
            applications for registration (collectively, "Marks");

                        (C) copyrights in both published and unpublished works,
            including without limitation all compilations, databases and
            computer programs, manuals and other documentation and all copyright
            registrations and applications, and all derivatives, translations,
            adaptations and combinations of the above (collectively,
            "Copyrights");

                        (D) know-how, trade secrets, confidential or proprietary
            information, research in progress, algorithms, data, designs,
            processes, formulae, drawings, schematics, blueprints, flow charts,
            models, strategies, prototypes, techniques, Beta testing procedures
            and Beta testing results (collectively, "Trade Secrets"); and

                        (E) goodwill, franchises, licenses, permits, consents,
            approvals, and claims of infringement against third parties.

                  (iv) "Products" means those computer programs and/or services
      and related documentation designed, manufactured, marketed, sold and/or
      distributed by the Company. A complete list of the Products owned by
      Seller is provided on Schedule 2.16(b)(iv) attached hereto.

      2.15 LITIGATION. There is no litigation or governmental or administrative
proceeding or investigation pending or, to the knowledge of the Company,
threatened against the Company or

                                      -16-
<PAGE>

affecting the properties or assets of the Company, or, as to matters related to
the Company, against any officer, director, shareholder or key employee of the
Company in their respective capacities in such positions, nor, to the knowledge
of the Company, has there occurred any event nor does there exist any condition
on the basis of which any such claim may be asserted. Section 2.15 of the
Disclosure Schedule includes a description of all litigation, claims,
proceedings or, to the Company's knowledge, investigations involving the Company
or any of its officers, directors, shareholders or key employees in connection
with the business of the Company occurring, arising or existing during the past
three (3) years.

      2.16 LABOR MATTERS. The Company employs approximately one hundred seventy
six (176) full-time and five (5) part-time employees and generally enjoys good
employer-employee relationships. The Company is not delinquent in payments to
any of its employees for any wages, salaries, commissions, bonuses or other
direct compensation for any services performed for the Company as of the date
hereof or amounts required to be reimbursed to such employees. The Company is
and heretofore has been in compliance in all material respects with all
applicable laws and regulations respecting labor, employment, fair employment
practices, terms and conditions of employment, occupational safety and health,
and wages and hours. There are no charges of employment discrimination or unfair
labor practices or strikes, slowdowns, stoppages of work, or any other concerted
interference with normal operations existing, pending or, to the knowledge of
the Company, threatened against or involving the Company. The Company is, and at
all times the Company has been, in compliance in all material respects with the
requirements of the Immigration Reform Control Act of 1986. There are no changes
pending or, to the knowledge of the Company, threatened with respect to
(including, without limitation, the resignation of) the senior management or key
supervisory personnel or key independent contractors of the Company nor has the
Company received any notice or information concerning any prospective change
with respect to such senior management or key supervisory personnel. The Company
has never implemented any plant closing or mass layoff of employees as those
terms are defined in the Worker Adjustment Retraining and Notification Act of
1988, amended, or any similar state or local law or regulation, and no layoffs
that could implicate such laws or regulations are currently contemplated.

      2.17 PERMITS; COMPLIANCE WITH LAWS. The Company has all franchises,
authorizations, approvals, orders, consents, licenses, certificates, permits,
registrations, qualifications or other rights and privileges (collectively
"PERMITS") necessary to permit it to own its property and to conduct its
business as it is presently conducted or proposed to be conducted and all such
Permits are valid and in full force and effect. No Permit is subject to
termination as a result of the execution of this Agreement or consummation of
the transactions contemplated hereby. The Company is now and has heretofore been
in compliance in all material respects with all applicable statutes, ordinances,
orders, rules and regulations promulgated by any U.S. federal, state, municipal,
non-U.S. or other governmental authority, which apply to the conduct of its
business. The Company has never entered into or been subject to any judgment,
consent decree, compliance order or administrative order with respect to any
aspect of the business, affairs, properties or assets of the Company or received
any request for information, notice, demand letter, administrative inquiry or
formal or informal complaint or claim from any regulatory agency with respect to
any aspect of the business, affairs, properties or assets of the Company.

                                      -17-
<PAGE>

      2.18 EMPLOYEE BENEFIT PROGRAMS.

            (a) The Company does not maintain or contribute to and for the past
five (5) years has not maintained or contributed to, any employee benefit plan
within the meaning of Section 3(3) of the Employee Retirement Income Security
Act of 1974, as amended ("ERISA"), any material fringe benefit, stock option,
equity-based compensation, phantom stock, bonus or incentive plan, severance pay
policy or agreement, retirement, pension, profit sharing or deferred
compensation plan or agreement, or any similar plan or agreement or any plan or
arrangement providing compensation to employees or non-employee directors (an
"EMPLOYEE BENEFIT PROGRAM") other than the Employee Benefit Programs identified
and described in Section 2.18(a) of the Disclosure Schedule attached hereto. A
brief description of each Employee Benefit Program has been provided to the
Investors. The terms and operation of each such Employee Benefit Program comply
and have heretofore complied in all material respects with all applicable laws
and regulations relating to each such Employee Benefit Program. There are no
unfunded obligations of the Company under any Employee Benefit Program that have
not been accrued unless such accrual is not necessary under generally accepted
accounting principles of the United States. The Company is not required to make
any payments or contributions to any Employee Benefit Program pursuant to any
collective bargaining agreement or, to the knowledge of the Company, any
applicable labor relations law, and all Employee Benefit Programs are terminable
at the discretion of the Company without liability to the Company upon or
following such termination, except for benefits accrued under the terms of such
Employee Benefit Programs. Except as described in Section 2.18(a) of the
Disclosure Schedule, the Company has never maintained or contributed to any
Employee Benefit Program providing or promising any health or other nonpension
benefits to employees after their employment terminates other than as required
by part 6 of subtitle B of Title I of ERISA. With respect to any Employee
Benefit Program, to the knowledge of the Company, there has occurred no
"prohibited transaction," as defined in Section 406 of ERISA or Section 4975 of
the Code, or breach of any duty under ERISA or other applicable law that could
result, directly or indirectly, in any Taxes, penalties or other liability to
the Company. No litigation, arbitration or governmental administrative
proceeding (or investigation) or other proceeding (other than those relating to
routine claims for benefits) is pending or, to the knowledge of the Company,
threatened with respect to any such Employee Benefit Program.

            (b) Each Employee Benefit Program that has been intended to qualify
under Section 401(a) or 501(c)(9) of the Code has received a favorable
determination or approval letter from the IRS regarding its qualification under
such section or the time period for submitting a determination letter request
and adopting retroactive amendments under Code Section 401(b) and the
corresponding regulations is open as of the Closing Date and, to the Company's
Knowledge, each such Employee Benefit Plan has, in fact been qualified under the
applicable section of the Code from the effective date of such Employee Benefit
Program through and including the Closing Date (or, if earlier, the date that
all of such Employee Benefit Program's assets were distributed). Except as set
forth in Section 2.18(b) of the Disclosure Schedule, the Company has never
maintained any Employee Benefit Program which has been subject to Title IV of
ERISA or Code Section 412, including, but not limited to, any "multiemployer
plan" (as defined in Section 3(37) or Section 4001(a)(3) of ERISA). Each
reference to "Company" in this Section 2.18 also refers to any other entity that
is considered a single employer with the

                                      -18-
<PAGE>

Company under ERISA Section 4001(b) or part of the same "Controlled Group" as
the Company for purposes of ERISA Section 302(d)(8)(C). The Company's Employee
Stock Ownership Plan is not leveraged and is an "employee stock ownership plan"
within the meaning of Section 407(d)(6) of ERISA.

      2.19 INSURANCE COVERAGE. The Company has in full force and effect general
commercial, general liability, product liability, professional liability,
specified director's and officer's liability, workers compensation and
employee's liability, fire and casualty and such other appropriate insurance
policies with coverages customary for similarly situated companies in the same
or similar industries and as required by applicable law. Section 2.19 of the
Disclosure Schedule contains an accurate listing of the insurance policies
currently maintained by the Company. There are currently no claims pending
against the Company under any insurance policies currently in effect and
covering the property, business or employees of the Company, and all premiums
due and payable with respect to the policies maintained by the Company have been
paid to date. To the Company's knowledge, there is no threatened termination of
any such policies or arrangements.

      2.20 INVESTMENT BANKING; BROKERAGE. Except as set forth on Section 2.20 of
the Disclosure Schedule, there are no claims for investment banking fees,
brokerage commissions, broker's or finder's fees or similar compensation in
connection with the transactions contemplated by this Agreement payable by the
Company or based on any arrangement or agreement made by or on behalf of the
Company.

      2.21 ENVIRONMENTAL MATTERS. Except as set forth on Section 2.21 of the
Disclosure Schedule, no hazardous waste, substance or material, and no oil,
petroleum, petroleum product, asbestos, toxic substance, pollutant or
contaminant (collectively, "HAZARDOUS MATERIAL"), has been generated,
transported, used, handled, processed, disposed, stored or treated on any real
property owned, leased or operated by the Company. Except as set forth on
Section 2.21 of the Disclosure Schedule, no Hazardous Material has been spilled,
released, discharged, disposed, or transported from any real property owned,
leased or operated by the Company, and no Hazardous Material is present in, on,
or under any such property. The Company is, and at all times has been, in
compliance in all material respects with all applicable environmental, health
and safety laws, rules, ordinances, by-laws and regulations, and with all
permits, registrations and approvals required under such laws, rules,
ordinances, by-laws and regulations (collectively, "ENVIRONMENTAL LAWS"). Except
as set forth on Section 2.21 of the Disclosure Schedule, the Company is not
aware of any fact or circumstance that could involve the Company in any
litigation, or impose upon the Company any liability, arising under any
Environmental Laws.

      2.22 CUSTOMERS, DISTRIBUTORS AND PARTNERS. Section 2.22 of the Disclosure
Schedule sets forth the name of each customer and distributor of the Company who
accounted for more than five percent (5%) of the revenues of the Company for
each of the fiscal years ended September 30, 2001 and September 30, 2002 and/or
for the eleven months ended August 31, 2003 (the "CUSTOMERS" and "DISTRIBUTORS,"
respectively) together with the names of any persons or entities with which the
Company has a material strategic partnership or similar relationship
("PARTNERS"). Since the date of the Base Balance Sheet, no Customer, Distributor
or Partner of the Company has canceled or otherwise terminated its relationship
with the Company or has materially decreased its usage or purchase of the
services or products of the Company. No

                                      -19-
<PAGE>

Customer, Distributor or Partner has, to the knowledge of the Company, any plan
or intention to terminate, cancel or otherwise materially and adversely modify
its relationship with the Company or to decrease materially or limit its usage,
purchase or distribution of the services or products of the Company.

      2.23 SUPPLIERS. The Company's relationships with its major suppliers are
good commercial working relationships, and, within the last twelve months, no
supplier that the Company has paid or is under contract to pay $100,000 or more
has canceled, materially modified, or otherwise terminated its relationship with
the Company, or materially decreased its services, supplies or materials to the
Company, nor to the knowledge of the Company, does any supplier have any plan or
intention to do any of the foregoing.

      2.24 WARRANTY AND RELATED MATTERS. Section 2.24 of the Disclosure Schedule
sets forth a complete list of all outstanding product and service warranties and
guarantees on any of the products or services that the Company distributes,
services, markets, sells or produces for itself, a customer or a third party
(each such product or service shall be referred to herein as a "COMPANY
PRODUCT"). There are no existing or, to the knowledge of the Company,
threatened, claims against the Company relating to any work performed by the
Company, product liability, warranty or other similar claims against the Company
alleging that any Company Product is defective or fails to meet any product or
service warranties. There are (a) no inherent design defects or systemic or
chronic problems in any Company Product other than in connection with Company
Products that are in testing or development stages and (b) no liabilities for
warranty or other claims or returns with respect to any Company Product relating
to any such defects or problems that could reasonably be expected to have a
Material Adverse Effect.

      2.25 ILLEGAL PAYMENTS. Neither the Company nor, to the Company's
knowledge, any Person affiliated with the Company has ever offered, made or
received on behalf of the Company any illegal payment or contribution of any
kind, directly or indirectly, including, without limitation, payments, gifts or
gratuities, to any person, entity, or United States or foreign national, state
or local government officials, employees or agents or candidates therefor or
other persons.

      2.26 SOLVENCY. The Company has not: (a) made a general assignment for the
benefit of creditors; (b) filed any voluntary petition in bankruptcy or suffered
the filing of any involuntary petition by its creditors; (c) suffered the
appointment of a receiver to take possession of all, or substantially all, of
its assets; (d) suffered the attachment or other judicial seizure of all, or
substantially all, of its assets; (e) admitted in writing its inability to pay
its debts as they come due; or (f) made an offer of settlement, extension or
composition to its creditors generally.

      2.27 PRIVACY OF CUSTOMER INFORMATION. The Company has not used and does
not currently use any of the consumer or customer information that it has
received or currently receives through its website or otherwise in an unlawful
manner. The Company has not collected any customer information through its
website or otherwise in an unlawful manner. The Company has commercially
reasonable security measures in place to protect the consumer or customer
information it receives through its website or otherwise and, which it stores in
its computer systems, from illegal use by third parties or use by third parties
in a manner violative of the rights of privacy of its customers.

                                      -20-
<PAGE>

      2.28 BACKLOG. The Company has a backlog of purchase orders for the sale of
its products and services as set forth in Section 2.28 of the Disclosure
Schedule. None of such orders has been cancelled or materially reduced, and each
of such orders on backlog is at a price and on terms (including margin)
consistent with the Company's past practices and the ordinary course of
business.

      2.29 HEALTH MATTERS. To the Company's knowledge, each of Leonard Foxman
and Ted Foxman is in good health as of the Closing.

      2.30 DISCLOSURE. The representations and warranties made or contained in
this Agreement, the Disclosure Schedule and exhibits hereto and the certificates
and statements executed or delivered in connection herewith, when taken
together, do not and shall not contain any untrue statement of a material fact
and do not and shall not omit to state a material fact required to be stated
herein or therein or necessary in order to make such representations, warranties
or other material not misleading in the light of the circumstances in which they
were made or delivered. To the knowledge of the Company, there is no material
fact directly relating to the assets, liabilities, business, operations or
condition (financial or other) of the Company (including any competitive
developments other than facts that relate to general economic or industry trends
or conditions) that materially adversely affects the same. No officer or
director of the Company has been: (a) subject to voluntary or involuntary
petition under the federal bankruptcy laws or any state insolvency law or the
appointment of a receiver, fiscal agent or similar officer by a court for his or
her business or property or that of any partnership of which he or she was a
general partner or any corporation or business association of which he or she
was an executive officer; (b) convicted in a criminal proceeding or named as a
subject of a pending criminal proceeding (excluding traffic violations and other
minor offenses) or been otherwise accused of any act of moral turpitude; (c) the
subject of any order, judgment, or decree (not subsequently reversed, suspended
or vacated) of any court of competent jurisdiction permanently or temporarily
enjoining him or her from, or otherwise imposing limits or conditions on his or
her ability to engage in any securities, investment advisory, banking, insurance
or other type of business or acting as an officer or director of a public
company; (d) found by a court of competent jurisdiction in a civil action or by
the Securities and Exchange Commission ("SEC") or the Commodity Futures Trading
Commission to have violated any federal or state commodities, securities or
unfair trade practices law, which judgment or finding has not been subsequently
reversed, suspended, or vacated; or (e) has engaged in other conduct that would
be required to be disclosed in a prospectus under Item 401(f) of SEC Regulation
S-K.

SECTION 3. REPRESENTATIONS AND WARRANTIES OF THE INVESTORS

      In order to induce the Company to enter into this Agreement, each Investor
severally but not jointly represents and warrants to the Company the following:

      3.1 INVESTMENT STATUS. Each Investor is an "accredited investor," as such
term is defined in Rule 501 under the Securities Act of 1933, as amended (the
"Securities Act"). Each Investor is purchasing the Securities for its own
account, for investment only and not with a view to, or any present intention
of, effecting a distribution of such securities or any part thereof except
pursuant to a registration or an available exemption under applicable law. Each
Investor

                                      -21-
<PAGE>

acknowledges that its respective Securities have not been registered under the
Securities Act or the securities laws of any state or other jurisdiction and
cannot be disposed of unless they are subsequently registered under the
Securities Act and any applicable state laws or an exemption from such
registration is available.

      3.2 AUTHORITY AND NON-CONTRAVENTION. Each Investor has full right,
authority and power under its charter, by-laws or governing partnership
agreement, as applicable, to enter into this Agreement and all agreements,
documents and instruments executed by such Investor pursuant hereto and to carry
out the transactions contemplated hereby and thereby. This Agreement and all
agreements, documents and instruments executed by each Investor pursuant hereto
are valid and binding obligations of each of the Investors enforceable in
accordance with their respective terms, except: (x) as limited by applicable
bankruptcy, insolvency, reorganization, moratorium and other laws of general
application affecting enforcement of creditors' rights generally and (y) as
limited by laws relating to the availability of specific performance, injunctive
relief or other equitable remedies. The execution, delivery and performance of
this Agreement and all agreements, documents and instruments executed by each
such Investor pursuant hereto have been duly authorized by all necessary action
under each such Investor's charter, by-laws or governing partnership agreement,
as applicable. The execution, delivery and performance by each Investor of this
Agreement and all agreements, documents and instruments to be executed and
delivered by each such Investor pursuant hereto do not and will not: (a) violate
or result in a violation of, conflict with or constitute or result in a default
(whether after the giving of notice, lapse of time or both) under, accelerate
any obligation under, or give rise to a right of termination of, any material
contract, agreement, obligation, permit, license or authorization to which each
such Investor is a party or by which such Investor or its assets is bound, or
any provision of each such Investor's organizational documents; (b) violate or
result in a violation of, or constitute a default (whether after the giving of
notice, lapse of time or both) under, any provision of any law, regulation or
rule, or any order of, or any restriction imposed by, any court or governmental
agency applicable to each such Investor; or (c) require from each such Investor
any notice to, declaration or filing with, or consent or approval of, any
governmental authority or other third party (that has not already been
obtained).

SECTION 4. CLOSING CONDITIONS AND DELIVERIES

      The obligations of each Investor to purchase and pay for its pro rata
portion of the Convertible Preferred Shares shall be subject to the fulfillment
by the Company and the Stockholders to the Investors' reasonable satisfaction or
waiver on or before the Closing of the following conditions:

      4.1 TRANSACTIONS TO OCCUR PRIOR TO CLOSING. Immediately prior to Closing
the Company shall have completed the following transactions on terms
satisfactory to the Investors:

            (a) the Company shall have adopted the Articles of Incorporation and
the Bylaws, respectively, and such Articles of Incorporation shall have been
filed and become effective under the laws of the State of Illinois; and,

            (b) the Company shall have adopted the Stock Option and Grant Plan;
and

                                      -22-
<PAGE>

            (c) the Company shall have executed and delivered the Note Purchase
Agreement, issued the Subordinated Notes to the Lenders and received $30,000,000
in proceeds.

      4.2 AUTHORIZATION. The Board of Directors and shareholders of the Company
shall have duly adopted resolutions in the form reasonably satisfactory to the
Investors and shall have taken all action necessary for the purpose of
authorizing the Company to consummate all of the transactions contemplated
hereby (including, without limitation, (a) the issuance of the Convertible
Preferred Shares and, upon conversion thereof the Conversion Shares, (b) the
issuance of the Convertible Subordinated Notes and the Warrants and the Common
Stock issuable upon exercise thereon, and (c) approving such purchases by the
Investors for purposes of Section 16 of the Securities Exchange Act of 1934, as
amended (the "EXCHANGE ACT"), and Rule 16b-3 thereunder).

      4.3 APPROVALS, CONSENTS AND WAIVERS. The Company and the Stockholders
shall have made all filings with and notifications of governmental authorities,
regulatory agencies and other entities required to be made by such parties in
connection with the execution and delivery of this Agreement, the performance of
the transactions contemplated hereby and the continued operation of the business
of the Company subsequent to the Closing and the Investors shall have received
copies of all authorizations, waivers, consents and permits, in form and
substance reasonably satisfactory to the Investors, including any and all
notices, consents and waivers required from all third parties, including,
without limitation, applicable governmental authorities, regulatory agencies,
lessors, lenders and contract parties, required to permit the continuation of
the business of the Company and the consummation of the transactions
contemplated by this Agreement and to avoid a breach, default, termination,
acceleration or modification of any indenture, loan or credit agreement or any
other material agreement, contract, instrument, mortgage, lien, lease, permit,
authorization, order, writ, judgment, injunction, decree, determination or
arbitration award as a result of, or in connection with, the execution and
performance of this Agreement.

      4.4 DELIVERIES BY THE COMPANY AND THE STOCKHOLDERS TO THE INVESTORS. At
the Closing, the Company and the Stockholders, as the case may be, shall have
delivered, or shall have caused to be delivered, to the Investors, all in form
and substance satisfactory to the Investors, the following:

            (a) the Stockholders' Agreement executed by the Company and the
shareholders of the Company named therein;

            (b) the Registration Rights Agreement executed by the Company;

            (c) a Management Rights Letter in the form attached as Exhibit I;

            (d) a Non-competition Agreement in the form attached as Exhibit J
executed by the Company, the Investors, and each of Leonard Foxman and the
Foxman Family LLC;

            (e) an Employment Agreement in the form attached as Exhibit K (an
"EMPLOYMENT AGREEMENT") executed by the Company and each of Theodore Foxman,
Leonard Foxman, Jack Weimer, Steve Dollens and Derek Abramovitch;

                                      -23-
<PAGE>

            (f) Certificates issued by (i) the Secretary of State of the State
of Illinois certifying that the Company has legal existence and is in good
standing; and (ii) the Secretary of State (or similar authority) of each
jurisdiction in which the Company has qualified to do business as a foreign
corporation (or is required to be so qualified) as to such foreign
qualification;

            (g) A certificate issued by the Secretary of State of the State of
Illinois certifying that the Articles of Incorporation have been filed and are
effective;

            (h) A certificate executed by the Secretary of the Company
certifying (i) the names of the officers of the Company authorized to sign this
Agreement and the other agreements, documents and instruments executed by the
Company pursuant hereto, together with the true signatures of such officers;
(ii) copies of consent actions taken by the Board of Directors and shareholders
of the Company authorizing the appropriate officers of the Company to execute
and deliver this Agreement and all agreements, documents and instruments
executed by the Company pursuant hereto, and to consummate the transactions
contemplated hereby and thereby, including, without limitation: (A) the adoption
of the Articles of Incorporation and Bylaws; (B) the issuance of the Convertible
Preferred Shares; (C) upon conversion of the Convertible Preferred Shares, the
issuance of the Common Conversion Shares; and (iii) the effectiveness, and
setting forth a copy of, the Articles of Incorporation;

            (i) An opinion of Katten Muchin Zavis Rosenman, dated as of the
Closing Date, substantially in the form attached hereto as Exhibit L;

            (j) Stock certificates evidencing the Convertible Preferred Shares
acquired from the Company hereunder;

            (k) the Note Purchase Agreement and the Convertible Subordinated
Notes each executed by the Company in favor of the Lenders, respectively;

            (l) Director Indemnification Agreements executed by the Company in
favor of Michael C. Child, Jameson J. McJunkin, Leonard Foxman, and Theodore
Foxman, substantially in the form attached hereto as Exhibit M; and

            (m) Such other supporting documents and certificates as the
Investors may reasonably request or as may be required pursuant to this
Agreement including, but not limited to:

                  (i) evidence of the full release of that certain lien on all
      of the assets of the Company held by American National Bank and Trust
      Company of Chicago ("ANB");

                  (ii) evidence of the termination of those certain Incentive
      Bonus/Stock Option/Restriction/Non-Compete Agreements by and among the
      Company, Leonard Foxman and Jack Weimer or Steve Dollens, as applicable;

                                      -24-
<PAGE>

                  (iii) evidence of the amendment of that certain assignment
      agreement between the Company and Eagle Test Systems, YH;

                  (iv) evidence of the consent to the transactions contemplated
      hereby of ANB, the landlord with respect to the property located at 5020
      South Ash Avenue, Tempe, AZ and the landlord with respect to the property
      located at 620 Butterfield Road, Mundelein, Illinois; and

                  (v) evidence of the termination of that certain Service
      Agreement between the Company and Pacific Support Group Partners.

      4.5 CLOSING DELIVERIES BY THE INVESTORS TO THE COMPANY. At the Closing,
the Investors shall deliver, or shall have caused to be delivered, to the
Company, the following:

            (a) A wire transfer of immediately available funds by the Investors
to the Company in respect of the purchase price for the Convertible Preferred
Shares in the aggregate amount of $65,000,000;

            (b) The Stockholders' Agreement executed by each of the Investors;

            (c) The Registration Rights Agreement executed by each of the
Investors; and

            (d) Such other supporting documents and certificates as the Company
may reasonably request and as may be required pursuant to this Agreement.

      4.6 CLOSING DELIVERIES BY THE STOCKHOLDERS TO THE COMPANY. At the
Closing, the Stockholders shall deliver, or shall have caused to be delivered,
to the Company, the stock certificates evidencing the shares of Common Stock
being redeemed by the Company in the Redemption duly endorsed in blank or
accompanied by stock powers duly executed in blank.

      4.7 ALL PROCEEDINGS SATISFACTORY. All corporate and other proceedings of
the Company taken prior to or at the Closing in connection with the transactions
contemplated by this Agreement, and all documents and evidences incident
thereto, shall be reasonably satisfactory in form and substance to the
Investors.

      4.8 NO LITIGATION. No action or proceeding by or before any court,
administrative body or governmental agency shall have been instituted or
threatened which seeks to enjoin, restrain or prohibit, or might result in
damages in respect of, this Agreement or consummation of the transactions
contemplated by this Agreement. No law or regulation shall be in effect and no
court order shall have been entered in any action or proceeding instituted by
any party that enjoins, restrains or prohibits this Agreement or the complete
consummation of the transactions contemplated in this Agreement.

      4.9 NO VIOLATION OR INJUNCTION. The consummation of the transactions
contemplated by this Agreement shall not be in violation of any law or
regulation, and shall not be subject to any injunction, stay or restraining
order.

                                      -25-
<PAGE>

SECTION 5. SURVIVAL OF REPRESENTATIONS AND WARRANTIES; TRANSACTION RELATED
INDEMNIFICATION

      5.1 SURVIVAL OF REPRESENTATIONS, WARRANTIES AND COVENANTS.

            (a) All representations, warranties, covenants, and agreements of
the Company, the Stockholders and the Investors made in this Agreement, in the
Disclosure Schedule delivered to the Investors and all agreements, documents and
instruments executed and delivered in connection herewith (i) are material,
shall be deemed to have been relied upon by the party or parties to whom they
are made, and shall survive the Closing regardless of any investigation on the
part of such party or its representatives, with all parties hereto reserving
their respective rights hereunder and (ii) shall bind the parties' successors
and assigns (including, without limitation, any successor to the Company by way
of acquisition, merger or otherwise), whether so expressed or not, and, except
as otherwise provided in this Agreement, all such representations, warranties,
covenants and agreements shall inure to the benefit of the parties (subject to
Section 6.11 below) and their respective successors and assigns and to their
transferees of Securities, whether so expressed or not.

            (b) The representations and warranties contained in Section 2 hereof
shall expire and terminate and be of no further force and effect after the date
which is sixty (60) days following the Investors' receipt of the Company's
audited financial statements as of and for the fiscal year ending September 30,
2004, except that any written claim for breach thereof made prior to such
expiration date and delivered to the party against whom such indemnification is
sought shall survive thereafter and, as to any such claim, such applicable
expiration will not effect the rights to indemnification of the party making
such claim; provided, however, that any such written claim by the Investors with
respect to a breach of the representations and warranties of the Stockholders or
the Company may (i) with respect to a breach of the representations or
warranties contained in Section 2.1, Section 2.2, Section 2.4 or with respect to
fraud or intentional misrepresentation by the Company or the Stockholders, be
given at any time and (ii) with respect to a breach of the representations or
warranties contained in Section 2.12 and Section 2.20 and the items set forth in
Sections 5.2(a)(ii)-(iv) be given at any time prior to the expiration of the
applicable statute of limitations.

      5.2 TRANSACTION RELATED INDEMNIFICATION.

            (a) Each of the Stockholders acknowledges and agrees that the
Investors have relied on the representations, warranties, covenants and other
agreements of the Stockholders and the Company contained herein in connection
with their acquisition of the Convertible Preferred Stock and willingness to
provide the Company with the proceeds required to consummate the Redemption.
Accordingly, the Stockholders severally and not jointly, on his, her or its own
behalf and on behalf of his, her or its successors, executors, administrators,
estate, heirs and assigns (collectively, for the purposes of this Section 5.2,
the "STOCKHOLDER PARTIES", and each individually, a "STOCKHOLDER PARTY") (or, at
the sole option of the Investors with respect to any matter subject to
indemnification under this Section 5.2, the Company) agree (on a pro-rata basis
based on the relative proceeds received by each such Stockholder in the
Redemption), to defend, indemnify and hold the Investors, their respective
affiliates and direct and indirect partners

                                      -26-
<PAGE>

(including partners of partners and stockholders and members of partners),
members, stockholders, directors, officers, employees and agents and each person
who controls any of them within the meaning of Section 15 of the Securities Act
or Section 20 of the Exchange Act, (collectively, the "INVESTOR PARTIES" and,
individually, an "INVESTOR PARTY") harmless from and against any and all
damages, liabilities, losses, claims, diminution in value, obligations, liens,
assessments, judgments, Taxes, fines, penalties, reasonable costs and expenses
(including, without limitation, reasonable fees of a single counsel representing
the Investor Parties), as the same are incurred, of any kind or nature
whatsoever (whether or not arising out of third-party claims and including all
amounts paid in investigation, defense or settlement of the foregoing and
consequential damages) ("LOSSES") that may be sustained or suffered by any such
Investor Party based upon, arising out of, or by reason of (i) any breach of any
representation or warranty made by the Company or such Stockholders, as
applicable, in Section 2 of this Agreement; (ii) the generation, transport, use,
handling, processing, disposal, storage, release or treatment of the substance
1, 1, 1 trichloroethylene (TCE) ("TCE") at the property located at 1353 Armour
Boulevard, Mundelein, Illinois; (iii) any settlement, judgment or other payment
by the Company or any of its subsidiaries in excess of $250,000 with respect to
the Company's dispute with Schmidt Scientific Pte Ltd. ("Schmidt") in connection
with services performed by Schmidt for the Company, or (iv) any trademark
infringement claims by White Eagle Systems Technology, Inc. (or its successors
or assigns) with respect to the use by the Company of the name "Eagle Test
Systems" or a derivative thereof.

            (b) The Investor Parties jointly and severally agree to defend,
indemnify and hold the Stockholder Parties harmless from and against any and all
Losses that may be sustained or suffered by any such Stockholder Party based
upon, arising out of, or by reason of any breach of any representation or
warranty made by the Investors in Section 3 of this Agreement.

      5.3 LIMITATIONS ON TRANSACTION RELATED INDEMNIFICATION. Notwithstanding
anything in Section 5.2 to the contrary, (a) the Stockholder Indemnifying
Parties shall not be obligated to provide indemnification for Losses in respect
of claims made by any Investor Party for indemnification under Section 5.2 above
unless the total of all Losses in respect of claims made by the Investor Parties
for indemnification shall exceed $750,000 (the "DEDUCTIBLE") in the aggregate,
whereupon the total amount of such Losses in excess of the Deductible shall be
recoverable by the Investor Parties in accordance with the terms hereof, and (b)
the maximum amount payable by the Stockholder Parties to all Investor Parties
for Losses in respect of claims made by the Investor Parties for indemnification
under Section 5.2 shall not exceed $35,000,000; provided, however, that the
Investor Parties shall not be subject to any limitation pursuant to this Section
5.3 or otherwise, and shall be entitled to recovery from a Stockholder Party
(or, at the sole option of the Investors with respect to any matter subject to
indemnification under Section 5.2, from the Company for all Losses) for Losses
in connection with (i) fraud or intentional misrepresentation by the
Stockholders or the Company, (ii) the breach by the Company or the Stockholders
of any of the representations or warranties contained in Section 2.1, Section
2.2, Section 2.4, Section 2.6(c) and (d), Section 2.8, Section 2.12, or Section
2.20; (iii) the generation, transport, use, handling, processing, disposal,
storage, release or treatment of TCE at the property located at 1353 Armour
Boulevard, Mundelein, Illinois; (iii) any settlement, judgment or other payment
by the Company or any of its subsidiaries in excess of $250,000 with respect to
the Company's dispute with Schmidt in connection with services performed by

                                      -27-
<PAGE>

Schmidt for the Company, or (iv) any trademark infringement claims by White
Eagle Systems Technology, Inc. (or its successors or assigns) with respect to
the use by the Company of the name "Eagle Test Systems" or a derivative thereof.

      5.4 NOTICE; PAYMENT OF LOSSES; DEFENSE OF THIRD-PARTY CLAIMS.

            (a) An Indemnified Party (as defined below) shall give written
notice of a claim for indemnification under Section 5.2 to an Indemnifying Party
(as defined below) promptly after receipt of any written claim by any third
party and in any event not later than twenty (20) business days after receipt of
any such written claim (or not later than ten (10) business days after the
receipt of any such written claim in the event such written claim is in the form
of a formal complaint filed with a court of competent jurisdiction and served on
the Indemnified Party), specifying in reasonable detail the amount, nature and
source of the claim, and including therewith copies of any notices or other
documents received from third parties with respect to such claim; provided,
however, that failure to give such notice shall not limit the right of an
Indemnified Party to recover indemnity or reimbursement except to the extent
that the Indemnifying Party suffers any material prejudice or material harm with
respect to such claim as a result of such failure. The Indemnified Party shall
also provide the Indemnifying Party with such further information concerning any
such claims as the Indemnifying Party may reasonably request by written notice.

            (b) Within five (5) business days after receiving notice of a claim
for indemnification or reimbursement, the Indemnifying Party shall, by written
notice to the Indemnified Party, either (i) concede or deny liability for the
claim in whole or in part, or (ii) in the case of a claim asserted by a third
party, advise that the matters set forth in the notice are, or will be, subject
to contest or legal proceedings not yet finally resolved. If the Indemnifying
Party concedes liability in whole or in part, it shall, within twenty (20)
business days of such concession, pay the amount of the claim to the Indemnified
Party to the extent of the liability conceded. Any such payment shall be made in
immediately available funds equal to the amount of such claim so payable. If the
Indemnifying Party denies liability in whole or in part or advises that the
matters set forth in the notice are, or will be, subject to contest or legal
proceedings not yet finally resolved, then the Indemnifying Party shall make no
payment (except for the amount of any conceded liability payable as set forth
above) until the matter is resolved in accordance with this Agreement.

            (c) In the case of any third party claim, if within five (5)
business days after receiving the notice described in the preceding paragraph
(a), the Indemnifying Party gives written notice to the Indemnified Party
stating that the Indemnifying Party would be liable under the provisions hereof
for indemnity in the amount of such claim if such claim were valid and that the
Indemnifying Party disputes and intends to defend against such claim, liability
or expense at the Indemnifying Party's own cost and expense, then counsel for
the defense shall be selected by the Indemnifying Party (subject to the consent
of such Indemnified Party which consent shall not be unreasonably withheld) and
such Indemnifying Party shall not be required to make any payment to the
Indemnified Party with respect to such claim, liability or expense as long as
the Indemnifying Party is conducting a good faith and diligent defense at its
own expense; provided, however, that the assumption of defense of any such
matters by the Indemnifying Party shall relate solely to the claim, liability or
expense that is subject or potentially subject to

                                      -28-
<PAGE>

indemnification. If the Indemnifying Party assumes such defense in accordance
with the preceding sentence, it shall have the right, with the consent of such
Indemnified Party, which consent shall not be unreasonably withheld, to settle
all indemnifiable matters related to claims by third parties which are
susceptible to being settled provided the Indemnifying Party's obligation to
indemnify such Indemnified Party therefor will be fully satisfied only by
payment of money by the Indemnifying Party pursuant to a settlement which
includes a complete release of such Indemnified Party. The Indemnifying Party
shall keep such Indemnified Party apprised of the status of the claim, liability
or expense and any resulting suit, proceeding or enforcement action, shall
furnish such Indemnified Party with all documents and information that such
Indemnified Party shall reasonably request and shall consult with such
Indemnified Party prior to acting on major matters, including settlement
discussions. Notwithstanding anything herein stated, such Indemnified Party
shall at all times have the right to fully participate in such defense at its
own expense directly or through counsel; provided, however, if the named parties
to the action or proceeding include both the Indemnifying Party and the
Indemnified Party and representation of both parties by the same counsel would
be inappropriate under applicable standards of professional conduct, the
reasonable expense of separate counsel for such Indemnified Party shall be paid
by the Indemnifying Party provided that such Indemnifying Party shall be
obligated to pay for only one counsel for the Indemnified Party in any
jurisdiction. If no such notice of intent to dispute and defend is given by the
Indemnifying Party, or if such diligent good faith defense is not being or
ceases to be conducted, such Indemnified Party may undertake the defense of
(with counsel selected by such Indemnified Party), and shall have the right to
compromise or settle, such claim, liability or expense (exercising reasonable
business judgment) with the consent of the Indemnifying Party, which consent
shall not be unreasonably withheld. If such claim, liability or expense is one
that by its nature cannot be defended solely by the Indemnifying Party, then
such Indemnified Party shall make available all information and assistance that
the Indemnifying Party may reasonably request and shall cooperate with the
Indemnifying Party in such defense.

            For purposes of this Section 5.4 "Indemnifying Party" shall refer to
the Stockholder Party for indemnification under Section 5.1(a) and the Investor
Party for indemnification under Section 5.2(b). "Indemnified Party" shall refer
to the Investor Party for indemnification under Section 5.2(a) and the
Stockholder Party for indemnification under Section 5.2(b).

      5.5 LIMITATION ON CONTRIBUTION AND CERTAIN OTHER RIGHTS. The Company and
the Stockholders hereby agree that if, following the Closing, any claim is made
by any Stockholder, or otherwise becomes due from any Stockholder, pursuant to
Section 5.2 in respect of any Losses (a "LOSS PAYMENT"), such Stockholders shall
have no rights against the Company, or any director, officer or employee thereof
(in their capacity as such), whether by reason of contribution, indemnification,
subrogation or otherwise, in respect of any such Loss Payment, and shall not
take any action against the Company or any such person with respect thereto;
provided, however, that the foregoing limitation shall not apply to any claim
against the Company's directors, officers or employees for fraud.

                                      -29-
<PAGE>

SECTION 6. GENERAL

      6.1 WAIVERS AND CONSENTS; AMENDMENTS.

            (a) For the purposes of this Agreement and all agreements, documents
and instruments executed pursuant hereto, no course of dealing between or among
any of the parties hereto and no delay on the part of any party hereto in
exercising any rights hereunder or thereunder shall operate as a waiver of the
rights hereof and thereof. No covenant or provision hereof may be waived
otherwise than by a written instrument signed by the party or parties so waiving
such covenant or other provision as contemplated herein.

            (b) No amendment to this Agreement may be made without the written
consent of the Company and holders of a majority in interest of the outstanding
Securities (a "MAJORITY INTEREST"); provided that no amendment may be made to
Sections 1.3, 2, 4.6, or 5 hereof or this Section 6.1(b) without the written
consent of the holders of a majority in interest of the outstanding Common Stock
held by the Stockholders; and provided further that no amendment that by its
terms disproportionately and adversely affects any party hereto to may be made
without the written consent of that party.

            (c) Any actions required to be taken with respect to consents,
approvals or waivers required or contemplated to be given by the Investors
hereunder shall require a vote of Investors holding a Majority Interest, and any
such action by such Majority Interest shall bind all of the Investors.

      6.2 LEGEND ON SECURITIES. The Company and the Investors acknowledge and
agree that the following legend shall be typed on each certificate evidencing
any of the securities issued hereunder held at any time by the Investors:

      THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE
SECURITIES ACT OF 1933 (THE "ACT"), OR ANY STATE SECURITIES OR BLUE SKY LAWS AND
MAY NOT BE OFFERED, SOLD, TRANSFERRED, HYPOTHECATED OR OTHERWISE ASSIGNED EXCEPT
(1) PURSUANT TO A REGISTRATION STATEMENT WITH RESPECT TO SUCH SECURITIES WHICH
IS EFFECTIVE UNDER THE ACT OR (2) PURSUANT TO AN AVAILABLE EXEMPTION FROM
REGISTRATION UNDER THE ACT RELATING TO THE DISPOSITION OF SECURITIES AND (3) IN
ACCORDANCE WITH APPLICABLE STATE SECURITIES AND BLUE SKY LAWS.

      6.3 GOVERNING LAW. This Agreement shall be deemed to be a contract made
under, and shall be construed in accordance with, the laws of Illinois, without
giving effect to conflict of laws principles thereof.

      6.4 SECTION HEADINGS; CONSTRUCTION. The descriptive headings in this
Agreement have been inserted for convenience only and shall not be deemed to
limit or otherwise affect the construction of any provision thereof or hereof.
The use in this Agreement of the masculine pronoun in reference to a party
hereto shall be deemed to include the feminine or neuter, and vice versa, as the
context may require. The parties have participated jointly in the negotiation
and

                                      -30-
<PAGE>

drafting of this Agreement and the other agreements, documents and instruments
executed and delivered in connection herewith with counsel sophisticated in
investment transactions. In the event an ambiguity or question of intent or
interpretation arises, this Agreement and the agreements, documents and
instruments executed and delivered in connection herewith shall be construed as
if drafted jointly by the parties and no presumption or burden of proof shall
arise favoring or disfavoring any party by virtue of the authorship of any
provisions of this Agreement and the agreements, documents and instruments
executed and delivered in connection herewith.

      6.5 COUNTERPARTS. This Agreement may be executed simultaneously in any
number of counterparts, each of which when so executed and delivered shall be
taken to be an original; but such counterparts shall together constitute but one
and the same document.

      6.6 NOTICES AND DEMANDS. Any notice or demand which is required or
provided to be given under this Agreement shall be deemed to have been
sufficiently given and received for all purposes when delivered in writing by
hand, telecopy, telex or other method of facsimile, or five (5) days after being
sent by certified or registered mail, postage and charges prepaid, return
receipt requested, or two (2) days after being sent by overnight delivery
providing receipt of delivery, to the following addresses: if to the Company or
the Stockholders, Eagle Test Systems, 620 S. Butterfield Road, Mundelein, IL
60060-4483, Attention: Len Foxman and Ted Foxman, Facsimile: (847) 367-8640, or
at any other address designated by the Company, to the Investors and the other
parties hereto in writing; if to the Investors, TA Associates, Inc., 125 High
Street, Suite 2500, Boston, MA 02110, Attention Michael C. Child and Jameson J.
McJunkin, Facsimile: (617) 574-6728, or at any other address designated by the
Investors to the Company in writing.

      6.7 DISPUTE RESOLUTION

            (a) All disputes, claims, or controversies arising out of or
relating to (i) this Agreement, the Stockholders' Agreement, the Registration
Rights Agreement, or any other agreement executed and delivered pursuant to this
Agreement or the negotiation, breach, validity or performance hereof and thereof
or the transactions contemplated hereby and thereby, (ii) the rights of the
Investors and their successors and the obligations of the Company set forth in
the Articles of Incorporation or (iii) the Investors' ongoing investment in the
Company, that are not resolved by mutual agreement shall be resolved solely and
exclusively by binding arbitration to be conducted before J.A.M.S./Endispute,
Inc. in Chicago, Illinois before a single arbitrator (the "ARBITRATOR"). The
parties understand and agree that this arbitration shall apply equally to claims
of fraud or fraud in the inducement.

            (b) The parties covenant and agree that the arbitration shall
commence within one hundred and eighty (180) days of the date on which a written
demand for arbitration is filed by any party hereto (the "FILING DATE"). In
connection with the arbitration proceeding, the Arbitrator shall have the power
to order the production of documents by each party and any third-party
witnesses. In addition, each party may take up to three depositions as of right,
and the Arbitrator may in his or her discretion allow additional depositions
upon good cause shown by the moving party. However, the Arbitrator shall not
have the power to order the answering of interrogatories or the response to
requests for admission. In connection with any arbitration, each party shall
provide to the other, no later than seven (7) business days before the date of
the

                                      -31-
<PAGE>

arbitration, the identity of all persons that may testify at the arbitration and
a copy of all documents that may be introduced at the arbitration or considered
or used by a party's witnesses or experts. The Arbitrator's decision and award
shall be made and delivered within two hundred and forty (240) days of the
Filing Date. The Arbitrator's decision shall set forth a reasoned basis for any
award of damages or finding of liability. The Arbitrator shall not have power to
award damages in excess of actual compensatory damages and shall not multiply
actual damages or award punitive damages or any other damages that are
specifically excluded under this Agreement, and each party hereby irrevocably
waives any claim to such damages.

            (c) The parties covenant and agree that they will participate in the
arbitration in good faith and that they will, except as provided in Section 5.2
of this Agreement, (i) bear their own attorneys' fees, costs and expenses in
connection with the arbitration, and (ii) share equally in the fees and expenses
charged by the Arbitrator. Any party unsuccessfully refusing to comply with an
order of the Arbitrators shall be liable for costs and expenses, including
attorneys' fees, incurred by the other party in enforcing the award. This
Section 6.7 applies equally to requests for temporary, preliminary or permanent
injunctive relief, except that in the case of temporary or preliminary
injunctive relief any party may proceed in court without prior arbitration for
the purpose of avoiding immediate and irreparable harm or to enforce its rights
under any non-competition covenants.

      6.8 CONSENT TO JURISDICTION. Except as provided in Section 6.7(c) and 6.9,
each of the parties hereto irrevocably and unconditionally consents to the
jurisdiction of J.A.M.S./Endispute, Inc. to resolve all disputes, claims or
controversies arising out of or relating to (i) this Agreement, the
Stockholders' Agreement, the Registration Rights Agreement or any other
agreement executed and delivered pursuant to this Agreement or the negotiation,
breach, validity or performance hereof and thereof or the transactions
contemplated hereby and thereby, (ii) the rights of the Investors and their
successors and the obligations of the Company set forth in the Articles of
Incorporation or (iii) the Investors' ongoing investment in the Company, and
further consents to the sole and exclusive jurisdiction of the courts of
Illinois and California for the purposes of enforcing the arbitration provisions
of Section 6.7 of this Agreement. Each party further irrevocably waives any
objection to proceeding before the Arbitrator based upon lack of personal
jurisdiction or to the laying of venue and further irrevocably and
unconditionally waives and agrees not to make a claim in any court that
arbitration before the Arbitrator has been brought in an inconvenient forum.
Each of the parties hereto hereby consents to service of process by registered
mail at the address to which notices are to be given. Each of the parties hereto
agrees that its or his submission to jurisdiction and its or his consent to
service of process by mail is made for the express benefit of the other parties
hereto.

      6.9 REMEDIES; SEVERABILITY. Notwithstanding Sections 6.7 and 6.8 above, it
is specifically understood and agreed that any breach of the provisions of this
Agreement, the Stockholders' Agreement, the Registration Rights Agreement, or
any other agreement executed and delivered pursuant to this Agreement, or of the
provisions of the Articles of Incorporation, by any person subject hereto will
result in irreparable injury to the other parties hereto, that the remedy at law
alone will be an inadequate remedy for such breach, and that, in addition to any
other remedies which they may have, such other parties may enforce their
respective rights by actions for specific performance (to the extent permitted
by law). Whenever possible, each

                                      -32-
<PAGE>

provision of this Agreement shall be interpreted in such a manner as to be
effective and valid under applicable law, but if any provision of this Agreement
shall be deemed prohibited or invalid under such applicable law, such provision
shall be ineffective to the extent of such prohibition or invalidity, and such
prohibition or invalidity shall not invalidate the remainder of such provision
or the other provisions of this Agreement.

      6.10 INTEGRATION. This Agreement, including the exhibits, documents and
instruments referred to herein or therein constitute the entire agreement, and
supersede all other prior agreements and understandings, both written and oral,
among the parties with respect to the subject matter hereof and thereof,
including, without limitation, the provisions of the letter of intent between
the parties hereto in respect of the transactions contemplated herein, which
provisions of the letter of intent shall be completely superseded by the
representations, warranties, covenants and agreements of the Company contained
herein.

      6.11 ASSIGNABILITY; BINDING AGREEMENT. Each Investor may assign any or all
of its rights hereunder to any transferee of its shares. This Agreement may not
otherwise be assigned by any party hereto without the prior written consent of
each other party hereto. This Agreement (including, without limitation, the
provisions of Section 5) shall be binding upon and enforceable by, and shall
inure to the benefit of, the parties hereto and their respective successors,
heirs, executors, administrators and permitted assigns, and no others.
Notwithstanding the foregoing and except as provided in Section 5.3 hereof,
nothing in this Agreement is intended to give any Person not named herein the
benefit of any legal or equitable right, remedy or claim under this Agreement,
except as expressly provided herein.

      6.12 RELEASE.

            (a) For and in consideration of the amount to be paid to each
Stockholder under this Agreement, and the additional covenants and promises set
forth in this Agreement, each Stockholder, on behalf of itself and its assigns,
heirs, beneficiaries, creditors, representatives, agents and affiliates (the
"Releasing Parties"), hereby fully, finally and irrevocably releases, acquits
and forever discharges the Company, and each of the Investors, and the officers,
directors, partners, general partners, limited partners, managing directors,
members, stockholders, trustees, shareholders, representatives, employees,
principals, agents, Affiliates, parents, subsidiaries, joint ventures,
predecessors, successors, assigns, beneficiaries, heirs, executors, personal or
legal representatives, insurers and attorneys of any of them, including without
limitation Michael C. Child and Jameson J. McJunkin (collectively, the "Released
Parties") from any and all commitments, actions, debts, claims, counterclaims,
suits, causes of action, damages, demands, liabilities, obligations, costs,
expenses, and compensation of every kind and nature whatsoever, at law or in
equity, whether known or unknown, contingent or otherwise, that such Releasing
Parties, or any of them, had, has, or may have had at any time in the past until
and including the date of this Agreement based on events or occurrences through
the date of this Agreement against the Released Parties, or any of them,
including but not limited to any claims that relate to or arise out of such
Releasing Party's prior relationship with the Company or its rights or status as
a shareholder, officer or director of the Company (collectively, for the
purposes of this Section 6.12, "Causes of Action"). In executing this Agreement,
each Stockholder acknowledges that it has been informed that the Company and/or
its Subsidiaries may from time to time enter into agreements for additional
types of financing, including without

                                      -33-
<PAGE>

limitation recapitalizations, mergers and initial public offerings of capital
stock of the Company and/or its Subsidiaries, and also may pursue acquisitions
or enter into agreements for the sale of the Company and/or its Subsidiaries or
all or a portion of the Company's or its Subsidiaries' assets, which may result
in or reflect an increase in equity value or enterprise value.

            (b) Each Stockholder hereby represents to the Released Parties that
such Stockholder (i) has not assigned any Causes of Action or possible Causes of
Action against any Released Party, (ii) fully intends to release all Causes of
Action against the Released Parties including, without limitation, unknown and
contingent Causes of Action (other than those specifically reserved above), and
(iii) has consulted with counsel with respect to the execution and delivery of
this general release and has been fully apprised of the consequences hereof.
Furthermore, each Stockholder further agrees not to institute any litigation,
lawsuit, claim or action against any Released Party with respect to the released
Causes of Action.

            (c) Each Stockholder hereby represents and warrants that it has
access to adequate information regarding the terms of this Agreement, the scope
and effect of the releases set forth herein, and all other matters encompassed
by this Agreement to make an informed and knowledgeable decision with regard to
entering into this Agreement. The Stockholder further represents and warrants
that it has not relied upon the Company, the Investors or the Released Parties
in deciding to enter into this Agreement and has instead made its own
independent analysis and decision to enter into this Agreement.

      6.13 CONFIDENTIALITY. Notwithstanding anything herein or any other express
or implied agreement, arrangement or understanding to the contrary, the parties
acknowledge and agree that (i) any obligations of confidentiality contained
herein and therein do not apply and have not applied from the commencement of
discussions between the parties to the tax treatment and tax structure of the
transactions contemplated by this Agreement (and any related transactions or
agreements) and (ii) each party to this Agreement (and each of its employees,
representatives or other agents) may disclose to any and all persons, without
limitation of any kind, the tax treatment and tax structure of the transactions
contemplated by this Agreement and all materials of any kind (including opinions
or other tax analyses) that are provided to it relating to such tax treatment
and tax structure. This authorization to disclose the tax treatment and tax
structure is limited to the extent that confidentiality is required to comply
with any applicable securities laws.

      6.14 EXPENSES. The Company and the Stockholders shall each be responsible
for fifty percent (50%) of all (i) broker and banker fees incurred by the
Stockholders and the Company in connection with transactions contemplated by
this Agreement and (ii) the reasonable costs and expenses (including, but not
limited to, accounting and legal fees and disbursements and other out of pocket
expenses) incurred by the Investors, the Stockholders and the Company in
connection with the preparation, negotiation, execution and delivery of this
Agreement, all other transaction documents contemplated hereby, and the
transactions contemplated hereby and thereby.

      6.15 CERTAIN DEFINITIONS. For purposes of this Agreement, the term:

                                      -34-
<PAGE>

            (a) "AFFILIATE" of a Person shall mean (i) with respect to a Person,
any member of such Person's family (including any child, step-child, parent,
step-parent, spouse, sibling, mother-in-law, father-in-law, son-in-law,
daughter-in-law, brother-in-law or sister-in-law); (ii) with respect to an
entity, any officer, director, stockholder, partner or investor in such entity
or of or in any affiliate of such entity; and (iii) with respect to a Person or
entity, any Person or entity which directly or indirectly controls, is
controlled by, or is under common control with such Person or entity;

            (b) "CONTROL" (including the terms "controlled by" and "under common
control with") means the possession, directly or indirectly, or as trustee or
executor, of the power to direct or cause the direction of the management
policies of a Person, whether through the ownership of stock, as trustee or
executor, by contract or credit arrangement or otherwise;

            (c) "PERSON" means an individual, corporation, partnership,
association, trust, any unincorporated organization or any other entity; and

            (d) "SUBSIDIARY" of a Person means any corporation more than fifty
(50%) percent of whose outstanding voting securities, or any partnership,
limited liability company joint venture or other entity more than fifty percent
(50%) of whose total equity interest, is directly or indirectly owned by such
Person.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

                                      -35-
<PAGE>

      IN WITNESS WHEREOF, the parties have executed this Agreement or have
caused this Agreement to be duly executed and delivered by their proper and duly
authorized officers as of the day and year first above written.

                                               THE COMPANY:

                                               EAGLE TEST SYSTEMS, INC.

                                               By: /s/ Leonard Foxman
                                                  ------------------------------
                                               Name: Leonard Foxman
                                               Title: President

                [SIGNATURE PAGE TO REGISTRATION RIGHTS AGREEMENT]
<PAGE>

                                               LEONARD FOXMAN

                                               By: /s/ Leonard Foxman
                                                  ------------------------------
                                               Leonard Foxman

                                               FOXMAN FAMILY, LLC

                                               By: /s/ Leonard Foxman
                                                  ------------------------------
                                                  Leonard Foxman

                                               Its: Manager

                                               EAGLE TEST SYSTEMS, INC.
                                               EMPLOYEE STOCK OWNERSHIP PLAN

                                               By: /s/ Leonard Foxman
                                                  ------------------------------
                                                  Leonard Foxman, not in his
                                                  individual capacity or in his
                                                  capacity as shareholder,
                                                  director or officer of the
                                                  Corporation, but solely as
                                                  trustee of the Eagle Test
                                                  Systems Employee Stock
                                                  Ownership Plan

                                               JACK WEIMER

                                               By: /s/ Jack Weimer
                                                  ------------------------------
                                                   Jack Weimer

                                               STEVE DOLLENS

                                               By: /s/ Steve Dollens
                                                  ------------------------------
                                                   Steve Dollens

<PAGE>

                                       INVESTORS:

                                       TA IX L.P.
                                       By: TA Associates IX LLC, its General
                                           Partner
                                       By: TA Associates, Inc., its Manager

                                       By: /s/ Michael C. Child
                                          --------------------------------------
                                       Name: Michael C. Child
                                       Its: Managing Director

                                       TA/ATLANTIC AND PACIFIC IV L.P.
                                       By: TA Associates AP IV L.P., its General
                                           Partner
                                       By: TA Associates, Inc., its General
                                           Partner

                                       By: /s/ Michael C. Child
                                          --------------------------------------
                                       Name: Michael C. Child
                                       Its:  Managing Director

                                       TA STRATEGIC PARTNERS FUND A L.P.
                                       By: TA Associates SPF L.P., its General
                                           Partner
                                       By: TA Associates, Inc., its General
                                           Partner

                                       By: /s/ Michael C. Child
                                          --------------------------------------
                                       Name: Michael C. Child
                                       Its:  Managing Director

<PAGE>

                                       TA STRATEGIC PARTNERS FUND B L.P.
                                       By: TA Associates SPF L.P., its General
                                           Partner
                                       By: TA Associates, Inc., its General
                                           Partner

                                       By: /s/ Michael C. Child
                                          --------------------------------------
                                       Name: Michael C. Child
                                       Its:  Managing Director

                                       TA INVESTORS LLC
                                       By: TA Associates, Inc., its Manager

                                       By: /s/ Michael C. Child
                                          --------------------------------------
                                       Name: Michael C. Child
                                       Its:  Managing Director

                                       TA SUBORDINATED DEBT FUND, L.P.
                                       By: TA Associates SDF LLC, its General
                                           Partner
                                       By: TA Associates, Inc., its Manager

                                       By: /s/ Michael C. Child
                                          --------------------------------------
                                       Name: Michael C. Child
                                       Its:  Managing Director