Document:

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                                                                    Exhibit 10.3

[BELDEN CDT LOGO]                                      BELDEN CDT INC.
                                                       7701 FORSYTH BOULEVARD
                                                       SUITE 800
                                                       ST. LOUIS, MISSOURI 63105
                                                       TELEPHONE: (314) 854-8000
                                                       FACSIMILE: (314) 854-8001

PERSONAL & CONFIDENTIAL

May 17, 2005

Mr. C. Baker Cunningham
6424 Cecil Avenue
St. Louis, MO 63105

Dear Baker:

The terms of your retention award letter agreement (the "Retention Letter
Agreement"), dated as of June 28, 2004, are amended as follows:

   -  If you were to retire from Belden CDT Inc. (the "Company") before July 15,
      2006, the unpaid cash award under your Retention Letter Agreement will be
      paid upon your retirement, and the unvested portion of the restricted
      stock award under your letter agreement will vest upon your retirement.

   -  All other unvested restricted stock and stock options will vest upon your
      retirement, whether before or after July 15, 2006.

BELDEN CDT INC.

By: /s/ Kevin Bloomfield
    -----------------------------
    Kevin Bloomfield

Agreed:

    /s/ C. Baker Cunningham
    -----------------------------
    C. Baker Cunningham<PAGE>

                                                                    Exhibit 10.4

[BELDEN CDT LOGO]                                      BELDEN CDT INC.
                                                       7701 FORSYTH BOULEVARD
                                                       SUITE 800
                                                       ST. LOUIS, MISSOURI 63105
                                                       TELEPHONE: (314) 854-8000
                                                       FACSIMILE: (314) 854-8001

PERSONAL & CONFIDENTIAL

May 17, 2005

Mr. Richard K. Reece
21 Ballas Court
Town & Country, MO 63131

Re: Letter Agreement dated April 15, 2002

Dear Ricky:

The terms of the referenced letter agreement, dated as of April 15, 2002, are
amended as follows: Your Election Period will be six (6) months instead of
thirty (30) days.

BELDEN CDT INC.

By: /s/ Kevin L. Bloomfield
    -------------------------
    Kevin L. Bloomfield

Agreed:

    /s/ Richard K. Reece
    -------------------------
    Richard K. Reece<PAGE>

                                                                    Exhibit 10.5

[BELDEN CDT LOGO]                                      BELDEN CDT INC.
                                                       7701 FORSYTH BOULEVARD
                                                       SUITE 800
                                                       ST. LOUIS, MISSOURI 63105
                                                       TELEPHONE: (314) 854-8000
                                                       FACSIMILE: (314) 854-8001

PERSONAL & CONFIDENTIAL

May 17, 2005

Mr. Richard K. Reece
21 Ballas Court
Town & Country, MO 63131

Dear Ricky:

The terms of your retention award letter agreement (the "Retention Letter
Agreement"), dated as of June 28, 2004, are amended as follows: If you were to
elect to leave the Company in the event you were no longer reporting directly to
Mr. Cunningham and if your departure from the Company occurs before July 15,
2006, then you will receive the last one-third of your cash award and restricted
stock award (payable under the Retention Letter Agreement) on such date.

BELDEN CDT INC.

By: /s/ Kevin Bloomfield
    -------------------------
    Kevin Bloomfield

Agreed:

    /s/ Richard K. Reece
    -------------------------
    Richard K. Reeceexv10w1

 

Exhibit 10.1

REPLACEMENT REVOLVING NOTE

      

			
	$35,000,000
	 	Dated as of June 30, 2005
	 
	 	Due: June 30, 2006

        On or before June 30, 2006, CDW CORPORATION, f/k/a CDW COMPUTER CENTERS, INC. (the
“Undersigned”), for value received, promises to pay to the order of LASALLE BANK NATIONAL
ASSOCIATION, a national banking association (hereinafter, together with any holder thereof, called
“Bank”), whose address is 135 S. LaSalle Street, Chicago, Illinois 60603, the principal sum of
Thirty Five Million Dollars ($35,000,000) or if less, the aggregate unpaid principal amount of all
loans made by the Bank to the Undersigned hereunder (this “Note”). The unpaid principal amount
hereof shall bear interest at the Undersigned’s option of the following:

        (i) a fixed rate equal to the greater of (A) the “Prime Rate” (hereinafter
defined) minus two and one-half percent (-21/2%) per annum, or (B) the “Federal Funds Rate” (hereinafter
defined) plus one-half of one percent (+1/2%) per annum, for borrowings not to exceed thirty
(30) days, such rate to be fixed at the beginning of the term of such borrowing (the “Fixed
Prime Rate”); or

        (ii) a floating rate equal to the greater of (A) the Prime Rate minus two and one-half
percent (-21/2%) per annum, or (B) the Federal Funds Rate plus one-half of one percent (+1/2%)
per annum, for borrowings in excess of thirty (30) days (the “Floating Prime Rate”); the
Floating Prime Rate and the Fixed Prime Rate are referred to herein collectively as the
“Prime Rate”); or

        (iii) “Adjusted LIBOR” (hereinafter defined).

        1. For purposes hereof the following terms shall have the following definitions:

        “Prime Rate” shall mean the rate in effect from time to time as set by the Bank and
called its Prime Rate. The effective date of any change in said Prime Rate shall for purposes
hereof be the date the rate is changed by the Bank. The Bank shall not be obligated to give
notice of any change in the Prime Rate.

        “Federal Funds Rate” shall mean, for any day, the daily effective Federal Funds rate for
such day as published in the Federal Reserve Statistical Release H.15(“H.15”) (or, if such
Release is not published, the successor thereto or closest approximation thereto, as
determined by the Bank) for such day; provided that, the Federal Funds Rate for any day on
which the Federal Reserve Bank of New York, (the “New York Fed”) is not open for business
shall be the Federal Funds Rate for the next preceding day on which the New York Fed was open
for business; and provided, further, that if the Bank determines, in good faith, that it is
unable to determine the Federal Funds Rate on the basis of H.15, then the Bank shall
determine the Federal Funds Rate based on the quotations of three (3) dealers in Federal
Funds in New York City, as reasonably selected by the Bank, and the Bank’s determination of
such rate shall be binding and conclusive absent manifest error.

        “Adjusted LIBOR” means a rate of interest equal to one-half of one percent (1/2%) per
annum in excess of the rate of interest equal to (a) the per annum rate of interest at

 

 

which United States dollar deposits in an amount comparable to the amount of the
relevant LIBOR Loan and for a period equal to the relevant Interest Period are offered in the
London Interbank Eurodollar market at 11:00 a.m. (London time) two Business Days prior to the
commencement of such Interest Period, as published by Bloomberg’s Financial Markets
Commodities News (or if not so published, the Bank, in its sole discretion, shall designate
another daily financial or governmental publication of national circulation to determine such
rate), divided (and rounded upward, if necessary, to the nearest 1/16 of 1.00%) by (b) a
percentage equal to 100% minus the then stated maximum rate of all reserve requirements
(including, without limitation, any marginal, emergency, supplemental, special or other
reserves required by applicable law) applicable to any member bank of the Federal Reserve
System in respect of Eurocurrency funding or liabilities as defined in Regulation D (or any
successor category of liabilities under Regulation D), or as LIBOR is otherwise determined by
the Bank in its sole and absolute discretion. The Bank’s determination of LIBOR shall be
conclusive, absent manifest error.

        “Interest Period” shall mean successive one, two or three-month periods as selected from
time to time by the Undersigned by notice given to the Bank not less than three (3) business
days prior to the first day of each respective Interest Period; provided that: (i) each such
one, two or three-month period occurring after such initial period shall commence on the day
on which the next preceding period expires; (ii) the final Interest Period shall be such that
its expiration occurs on or before the stated maturity date of the Note; and (iii) if for any
reason the Undersigned shall fail to select timely a period, then it shall be deemed to have
selected a LIBOR Loan with a one(1) month Interest Period; provided that, at any time any
Interest Period expires less than one (1) month before the maturity of the Note, then, for
the period commencing on such expiration date and ending on the maturity date such LIBOR Loan
shall convert to a loan bearing interest at the Prime Rate.

        2. Interest on that portion of the outstanding principal amount hereof bearing interest at
the Prime Rate shall be payable from the date hereof on such aggregate unpaid principal amount on the
last day of each month, commencing on July 31, 2005, and at maturity hereof. Interest on LIBOR
borrowings shall be payable at the end of each respective Interest Period. Interest after maturity
(whether by reason of acceleration or otherwise) shall be paid on the unpaid balance at the Prime
Rate plus two percent (2%) per annum (the “Default Rate”). Interest shall be computed on the basis
of a year consisting of 360 days and shall be paid for the actual number of days elapsed, unless
otherwise specified herein.

        3. Each LIBOR borrowing hereunder (each, a “LIBOR Loan”) must equal $100,000 or an
integral multiple thereof. Interest on each LIBOR Loan shall be payable on the last banking day of
each Interest Period with respect thereto, commencing on the first such date to occur after the
date hereof, at maturity, after maturity on demand, and on the date of any payment hereon on the
amount paid. The Undersigned hereby further promises to pay to the order of the Bank, on demand,
interest on the unpaid principal amount hereof after maturity (whether by acceleration or
otherwise) at the Default Rate.

        4. Provisions applicable to LIBOR Loans: (a) The Bank’s determination of Adjusted
LIBOR as provided above shall be conclusive, absent manifest error. Furthermore, if the Bank
determines, in good faith (which determination shall be conclusive, absent manifest error), prior
to the commencement of any Interest Period that (a) U.S. dollar deposits of sufficient amount and
maturity for funding any LIBOR Loan are not available to the Bank in the London Interbank
Eurodollar market in the ordinary course of business, or (b) by reason of circumstances affecting

 

 

the London Interbank Eurodollar market, adequate and fair means do not exist for ascertaining the
rate of interest to be applicable to the relevant LIBOR Loan, the Bank shall promptly notify the
Undersigned and such LIBOR Loan shall automatically convert on the last day of its then-current
Interest Period to a loan bearing interest at the Prime Rate.

        If, after the date hereof, the introduction of, or any change in any applicable law, treaty,
rule, regulation or guideline or in the interpretation or administration thereof by any
governmental authority or any central bank or other fiscal, monetary or other authority having
jurisdiction over the Bank or its lending office (a “Regulatory Change”), shall, in the opinion of
counsel to the Bank, makes it unlawful for the Bank to make or maintain any LIBOR Loan evidenced
hereby, then the Bank shall promptly notify the Undersigned and such LIBOR Loan shall automatically
convert on the last day of its then-current Interest Period to a loan bearing interest at the Prime
Rate.

        If, for any reason, any LIBOR Loan is paid prior to the last business day of its
then-current Interest Period, the Undersigned agrees to indemnify the Bank against any loss (including any loss
on redeployment of the funds repaid), cost or expense incurred by the Bank as a result of such
prepayment.

        If any Regulatory Change (whether or not having the force of law) shall (a) impose, modify or
deem applicable any assessment, reserve, special deposit or similar requirement against assets held
by, or deposits in or for the account of or loans by, or any other acquisition of funds or
disbursements by, the Bank; (b) subject the Bank or any LIBOR Loan to any tax, duty, charge, stamp
tax or fee or change the basis of taxation of payments to the Bank of principal or interest due
from the Undersigned to the Bank hereunder (other than a change in taxation of the overall net
income of the Bank); or (c) impose on the Bank any other condition regarding such LIBOR Loan or the
Bank’s funding thereof, and the Bank shall determine (which determination shall be conclusive,
absent manifest error) that the result of the foregoing is to increase the cost to the Bank of
making or maintaining such LIBOR Loan or to reduce the amount of principal or interest received by
the Bank hereunder, then the Undersigned shall pay to the Bank, on demand and presentation of
satisfactory documentation therefor, such additional amounts as the Bank shall, from time to time,
determine are sufficient to compensate and indemnify the Bank for such increased cost or reduced
amount.

        5. The Undersigned hereby authorizes the Bank to charge any account of the Undersigned
for all sums due hereunder. Principal payments submitted in funds not available until collected
shall continue to bear interest until collected. If payment hereunder becomes due and payable on a
Saturday, Sunday or legal holiday under the laws of the United States or the State of Illinois, the
due date thereof shall be extended to the next succeeding business day, and interest shall be
payable thereon at the rate specified during such extension.

        6. This Note evidences a revolving line of credit under which the Undersigned is indebted to
the Bank and evidences the aggregate unpaid principal amount of all advances made or to be made by
the Bank to the Undersigned under the Note. All advances and repayments hereunder shall be
evidenced by entries on the books and records of the Bank which shall be presumptive evidence of
the principal amount and interest owing and unpaid on this Note, or any renewal or extension
hereof. The failure to so record any such amount or any error so recording any such amount shall
not, however, limit or otherwise affect the obligations of the Undersigned hereunder or under any
not to repay the principal amount of the liabilities together with all interest accruing thereon.
This Note may be used for direct advances or letters of credit issued by the Bank in its sole
discretion (“Letter(s) of Credit”). Each Letter of Credit requested by the Undersigned shall

 

 

be subject to the terms and conditions of the Master Letter of Credit Agreement dated June 28,
2000 and any Letter of Credit applications executed in relation thereto (collectively, the “Letter
of Credit Agreement”), which Letter of Credit Agreement is incorporated herein by this reference.
The amount available to the Undersigned under this Note shall be reduced by the face amount of all
Letters of Credit issued and outstanding hereunder. All Letters of Credit issued hereunder shall
have an expiry date no later than June 30, 2007. The Undersigned and the Bank agree that each draw
under any Letter of Credit shall constitute, and shall be repaid by, a direct advance under this
Note on the date of such draw. Each Letter of Credit requested by the Undersigned hereunder shall
be issued by the Bank only after the Bank has received a fully executed Letter of Credit
application on the Bank’s standard form and the Bank’s customary fees for issuance of Letters of
Credit. In addition to the foregoing, all standby Letters of Credit issued hereunder shall bear an
annual issuance fee equal to one half of one percent (.50%) of the face amount of such Letter of
Credit, payable annually in advance until, (i) such Letter of Credit has expired or has been
returned to the Bank, or (ii) the Bank has paid the Beneficiary the full face amount of such Letter
of Credit.

        7. Advances under this Note may be made by the Bank upon the written request of any two
(2) authorized officers of the Undersigned whose authority to so act has not been revoked by the
Undersigned in writing theretofore received by the Bank at its main office. Any such advances shall
be conclusively presumed to have been made by the Bank to or for the benefit of the Undersigned.
The Undersigned does hereby irrevocably confirm, ratify and approve all such advances by the Bank
and does hereby indemnify the Bank against loss and reasonable expenses (including court costs,
attorneys’ and paralegals’ fees) and shall hold the Bank harmless with respect thereto.

        8. The Undersigned shall be in default hereunder if: (a) any amount payable on this and any
and all other liabilities or obligations of the Undersigned to the Bank, howsoever created, arising
or evidenced, whether now existing or hereafter arising, whether now due or to become due, whether
direct, indirect, absolute, contingent, joint, several or joint and several (all such liabilities
and obligations, including this Note, are hereinafter referred to as the “Obligations”) or on the
obligations of any obligor hereunder, it not paid within five (5) days of when due; or (b) the
Undersigned shall otherwise fail to perform any of the promises to be performed by the Undersigned
hereunder or under any other security agreement or other agreement with the Bank and the same is
not cured within thirty (30) days of notice thereof by the Bank; or (c) the Undersigned, or any
other party liable with respect to the Obligations, or any guarantor or accommodation endorser or
third party pledgor, shall make any assignment for the benefit of creditors, or there shall be
commenced any bankruptcy, receivership, insolvency, reorganization, dissolution or liquidation
proceedings by or against, or the entry of any judgment, levy, attachment, garnishment or other
process, or the filing of any lien against the Undersigned or any guarantor, or any other party
liable with respect to the Obligations, or accommodation endorser or third party pledgor for any of
the Obligations which has a material adverse effect on such party; or (d) the determination by the
Bank that a material adverse change has occurred in the financial condition of the Undersigned from
the condition set forth in the most recent financial statement of the Undersigned furnished to the
Bank, or from the financial condition of the Undersigned most recently disclosed to the Bank in any
manner and the same is not cured within thirty (30) days of notice thereof by the Bank; or (e) any
oral or written warranty, representation, certificate or statement of the Undersigned to the Bank
is untrue in any material respect; or (f) failure of the Undersigned, within thirty (30) days after
a request by the Bank, to furnish financial information or to permit inspection by the Bank of the
Undersigned’s books and records; or (g) the occurrence of any material adverse event which causes a
change in the financial condition of the Undersigned, or which would have a material adverse effect
on the business of the Undersigned

 

 

and the same is not cured within thirty (30) days notice thereof by the Bank; or (h) the
Undersigned fails to have, at the end of each of its fiscal quarters (1) a Tangible Net Worth of at
least $300,000,000, or (2) a ratio of Liabilities to Tangible Net Worth of no greater than 1.0:1.0
and a default of either (1) or (2) shall not be cured by the Undersigned within thirty (30) days.

        9. For purposes hereof, “Tangible Net Worth” shall mean the sum of shareholders’ equity
plus debt subordinated to the Undersigned’s liabilities to the Bank, minus intangibles, including,
but not limited to, goodwill, customer lists, prepaid items, deferred charges, debts owed by
officers and other affiliates and such “Other Assets” as set forth on the financial statements of
the Undersigned. “Liabilities” shall mean all liabilities of the Undersigned that would be shown on
a balance sheet of the Undersigned prepared in accordance with generally accepted accounting
principles consistently applied.

        10. Whenever the Undersigned shall be in default as aforesaid, without demand or notice of any
kind except as set forth herein, the entire unpaid amount of all Obligations shall become
immediately due and payable, and the Bank may exercise, from time to time, any and all rights and
remedies available to it under the Uniform Commercial Code of Illinois, or otherwise, including
those available under any written instrument (in addition to this Note) relating to any of the
Obligations and may, without demand or notice of any kind, appropriate and apply toward the payment
of such of the Obligations, whether matured or unmatured, including reasonable costs of collection
and reasonable attorneys’ and paralegals’ fees, and in such order of application as the Bank may,
from time to time, elect, any balances, credits, deposits, accounts or monies of the Undersigned in
possession, control or custody of, or in transit to the Bank.

        11. THE UNDERSIGNED WAIVES THE BENEFIT OF ANY LAW THAT WOULD
OTHERWISE RESTRICT OR LIMIT THE BANK IN THE EXERCISE OF ITS RIGHTS, WHICH IS HEREBY ACKNOWLEDGED,
TO APPROPRIATE WITHOUT NOTICE, AT ANY TIME FOLLOWING DEFAULT (AFTER GIVING EFFECT TO APPLICABLE
GRACE OR CURE PERIODS, IF ANY), ANY INDEBTEDNESS MATURED OR UNMATURED, OWING FROM THE BANK TO THE
UNDERSIGNED. THE BANK MAY, FROM TIME TO TIME, WITHOUT DEMAND OR NOTICE OF ANY KIND, APPROPRIATE AND
APPLY TOWARD THE PAYMENT OF SUCH OF THE OBLIGATIONS, AND IN SUCH ORDER OF APPLICATION, AS THE BANK
MAY, FROM TIME TO TIME, ELECT ANY AND ALL SUCH BALANCES, CREDITS, DEPOSITS, ACCOUNTS, MONIES, CASH
EQUIVALENTS AND OTHER ASSETS OF OR IN THE NAME OF THE UNDERSIGNED, THEN OR THEREAFTER WITH THE
BANK.

        12. THE UNDERSIGNED WAIVES EVERY DEFENSE, CAUSE OF ACTION,
COUNTERCLAIM OR SET OFF WHICH THE UNDERSIGNED MAY NOT HAVE OR HEREAFTER MAY HAVE TO ANY ACTION BY
BANK IN ENFORCING THIS NOTE OR ANY OF THE OTHER OBLIGATIONS, RATIFIES AND CONFIRMS WHATEVER THE
BANK MAY DO PURSUANT TO THE TERMS HEREOF AND AGREES THAT BANK SHALL NOT BE LIABLE FOR ANY ERROR OF
JUDGMENT OR MISTAKES OF FACT OR LAW EXCEPT FOR THOSE ERRORS OR MISTAKES WHICH RESULT FROM THE
BANK’S GROSS NEGLIGENCE OR WILLFUL MISCONDUCT. THE BANK AND THE UNDERSIGNED, KNOWINGLY, VOLUNTARILY
AND INTENTIONALLY WAIVE IRREVOCABLY THE RIGHT EITHER MAY HAVE TO TRIAL BY JURY WITH RESPECT TO ANY
LEGAL PROCEEDING BASED HEREON, OR ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS NOTE OR ANY OF
THE OTHER OBLIGATIONS, OR ANY AGREEMENT, EXECUTED OR CONTEMPLATED TO BE EXECUTED IN CONJUNCTION

 

 

HEREWITH OR ANY COURSE OF CONDUCT OR COURSE OF DEALING IN WHICH THE BANK AND THE UNDERSIGNED ARE
ADVERSE PARTIES. THIS PROVISION IS A MATERIAL INDUCEMENT FOR THE BANK GRANTING ANY FINANCIAL
ACCOMMODATION TO THE UNDERSIGNED.

        13. The Undersigned, and any other party liable with respect to the Obligations, including
any guarantors, and any and all endorsers and accommodation parties, and each one of them, waive
any and all presentment, demand, notice of dishonor, protest, and all other notices and demands in
connection with the enforcement of the Bank’s right hereunder, and hereby consent to, and waive
notice of release, with or without consideration, of the Undersigned. No default shall be waived by
the Bank except in writing. No delay on the part of the Bank in the exercise of any right or remedy
shall operate as a waiver thereof, and no single or partial exercise by the Bank of any right or
remedy shall preclude other or further exercise thereof, or the exercise of any other right or
remedy. This Note: (I) is valid, binding and enforceable in accordance with its provisions, and no
conditions exist to the legal effectiveness of this Note; (ii) contains the entire agreement
between the Undersigned and the Bank; (iii) is the final expression of the intentions of the
Undersigned and the Bank; and (iv) supersedes all negotiations, representations, warranties,
commitments, offers, contracts (of any kind or nature, whether or al or written) prior to or
contemporaneous with the execution hereof. No prior or contemporaneous representation, warranties,
understandings, offers or agreements of any kind or nature, whether oral or written, have been made
by the Bank or relied upon by the Undersigned in connection with the execution hereof. No
modification, discharge, termination or waiver of any of the provisions hereof shall be binding
upon the Bank, except as expressly set forth in a writing duly signed and delivered on behalf of
the Bank.

        14. The Undersigned agrees to pay all reasonable costs, reasonable legal expenses,
reasonable attorneys fees and paralegals’ fees of every kind, paid or incurred by the Bank in
enforcing its rights hereunder, including, but not limited to, litigation or proceedings initiated
under the United States Bankruptcy Code, or in respect to any other of the Obligations, or in
defending against any defense, cause of action, counterclaim, set off or crossclaim based on any
act of commission or omission by the Bank with respect to this Note or any other of the
Obligations, promptly on demand of the Bank or other person paying or incurring the same.

        15. TO INDUCE THE BANK TO MAKE THE LOAN EVIDENCED BY THIS NOTE,
THE UNDERSIGNED IRREVOCABLY AGREES THAT ALL ACTIONS ARISING DIRECTLY OR INDIRECTLY AS A RESULT OR
IN CONSEQUENCE OF THIS NOTE OR ANY OTHER AGREEMENT WITH THE BANK SHALL BE INSTITUTED AND LITIGATED
ONLY IN COURTS HAVING SITUS IN THE CITY OF CHICAGO, ILLINOIS, AND THE UNDERSIGNED HEREBY CONSENTS
TO THE EXCLUSIVE JURISDICTION AND VENUE OF ANY STATE OR FEDERAL COURT LOCATED AND HAVING ITS SITUS
IN SAID CITY, AND WAIVES ANY OBJECTION BASED ON FORUM NON CONVENIENS. THE UNDERSIGNED HEREBY WAIVES
PERSONAL SERVICE OF ANY AND ALL PROCESS, AND CONSENTS THAT ALL SUCH SERVICE OF PROCESS MAY BE MADE
BY CERTIFIED MAIL, RETURN RECEIPT REQUESTED, DIRECTED TO THE UNDERSIGNED AT THE ADDRESS INDICATED
IN THE BANK’S RECORDS IN THE MANNER PROVIDED BY APPLICABLE STATUTE, LAW, RULE OF COURT OF
OTHERWISE.

        16. The loan evidenced hereby has been made and this Note has been delivered at the Bank’s
main office. This Note shall be governed and construed in accordance with the laws of the State of
Illinois, in which state it shall be performed, and shall be binding upon the Undersigned

 

 

and its successors and assigns. If this Note contains any blanks when executed by the
Undersigned, the Bank is hereby authorized, without notice to the Undersigned, to complete any such
blanks according to the terms upon which the loan or loans were granted. Wherever possible, each
provision of this Note shall be interpreted in such manner as to be effective and valid under
applicable law, but if any provision of this Note shall be prohibited by or be invalid under such
law, such provision shall be severable, and be deemed ineffective to the extent of such prohibition
or invalidity without invalidating the remaining provisions of this Note. If more than one party
shall execute this Note, the term “Undersigned” as used herein shall mean all parties signing this
Note and their respective successors and assigns, and such parties shall, as the case may be, be
jointly and severally obligated hereunder.

        17. The Undersigned represents and warrants to the Bank that the execution and delivery of
this Note has been duly authorized by resolutions heretofore adopted by its Board of Directors and
in accordance with law and its bylaws, that said resolutions have not been amended or rescinded,
are in full force and effect and that the officer or officers executing and delivering this Note
for and on behalf of the Undersigned are duly authorized so to act. The Bank, in extending
financial accommodations to the Undersigned, is expressly acting and relying upon the aforesaid
representations and warranties.

        18. The Undersigned acknowledges and agrees that the lending relationship hereby created
with the Bank is and has been conducted on an open and arm’s length basis in which no fiduciary
relationship exits and that the Undersigned has not relied and is not relying on any such fiduciary
relationship in consummating the loan evidenced by this Note.

        19. As used herein, all provisions shall include the masculine, feminine, neuter, singular and
plural thereof, wherever the context and facts require such construction and in particular the word
“Undersigned” shall be so construed.

        20. This Note is in replacement and substitution for, but not a repayment of, that certain
$35,000,000 Replacement Revolving Note dated as of June 30, 2004 of the Undersigned payable to the
order of the Bank and does not and shall not be deemed to constitute a novation therefor.

        IN WITNESS WHEREOF, the Undersigned has executed this Note on the date above set forth.

	 	 	 	 	 	 	 
	 
	 	 	CDW CORPORATION, f/k/a
	 	 	CDW COMPUTER CENTERS, INC.
	 
	 	 	 	 	 	 
	 
	 

	 	By:
	 	/s/ John A. Edwardson
	 	 
	 

	 	 	 	 	 
	 	 	Name: John A. Edwardson
	 	 	Title: Chairman & Chief Executive Officer
	 
	 	 	 	 	 	 
	 
	 	 	 	 	 	 
	 
	 

	 	By:
	 	/s/ Barbara A. Klein	 	 
	 

	 	 	 	 	 
	 	 	Name: Barbara A. Klein
	 	 	Title: Senior Vice President & Chief Financial Officer

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