CDW Achieves Record Full Year and Fourth Quarter Sales

VERNON HILLS, Ill.--(Business Wire)--CDW Corporation:

-- Full year 2007 sales: $8.145 billion, up 20.0% year-over-year

-- Fourth quarter 2007 sales: $2.134 billion, up 17.0%
year-over-year

CDW Corporation, a leading provider of technology products and
services to business, government and education, today announced record
quarterly sales in the fourth quarter of 2007 and record annual sales
for 2007.

"These sales results reflect the exceptional work of our coworkers
during a year of transition for CDW," said John A. Edwardson, chairman
and chief executive officer, CDW Corporation. "While CDW was being
acquired in a go-private transaction with affiliates of Madison
Dearborn Partners and Providence Equity Partners, our coworkers
continued to prove they are the best team in the industry by staying
focused, gaining market share and providing the best customer service
in the industry. We are well-positioned to make the investments
necessary to continue growing the company and bringing CDW's mix of
products and technology services to current and new customers."

Fourth Quarter of 2007

Total sales in the fourth quarter of 2007 were $2.134 billion,
compared to $1.824 billion in the fourth quarter of 2006, an increase
of 17.0 percent. Average daily sales in the fourth quarter of 2007
were $33.866 million, compared to $28.951 million in the fourth
quarter of 2006, representing a 17.0 percent increase. There were 63
billing days in both the fourth quarter of 2007 and the fourth quarter
of 2006.

Total sales in October 2007 were $764.1 million, compared to
$635.1 million in October 2006, representing a 20.3 percent increase.
Average daily sales in October 2007 were $33.220 million, compared to
$28.867 million in the prior year period, representing a 15.1 percent
increase. October 2007 had 23 billing days, and October 2006 had 22
billing days.

Total sales in November 2007 were $647.4 million, compared to
$569.2 million in November 2006, representing a 13.7 percent increase.
Average daily sales in November 2007 were $30.826 million, compared to
$27.105 million in the prior year period, representing a 13.7 percent
increase. November 2007 had 21 billing days, and November 2006 had 21
billing days.

Total sales in December 2007 were $722.1 million, compared to
$619.6 million in December 2006, representing a 16.5 percent increase.
Average daily sales in December 2007 were $38.008 million, compared to
$30.982 million in the prior year period, representing a 22.7 percent
increase. December 2007 had 19 billing days, and December 2006 had 20
billing days.

Full Year 2007

Total sales for 2007 were $8.145 billion, compared to $6.785
billion in 2006, an increase of 20.0 percent. Average daily sales for
2007 were $32.065 million, compared to $26.714 million in 2006,
representing a 20.0 percent increase. There were 254 billing days in
both 2007 and 2006.

Acquisition of Berbee Information Networks Corporation

As previously announced, CDW completed the acquisition of Berbee
Information Networks Corporation on October 11, 2006. October 2006
sales, fourth quarter 2006 sales, and full-year 2006 sales figures do
not include Berbee sales prior to October 11, 2006.

About CDW

CDW(R), ranked No. 342 on the 2007 FORTUNE 500 and No. 39 on
Forbes magazine's list of America's Largest Private Companies, is a
leading provider of technology solutions for business, government and
education. CDW is a principal source of technology products and
services including top name brands such as Acer, Adobe, APC, Apple,
Cisco, EMC, Fujitsu, HP, IBM, Lenovo, Microsoft, Panasonic, Quantum,
Samsung, Sony, Symantec, ViewSonic and Xerox.

CDW was founded in 1984 and as of December 31, 2007 employed
approximately 6,300 coworkers. In 2007, the company generated sales of
$8.145 billion. For more information, visit CDW.com.

Forward-Looking Statements

Any forward-looking statements contained in this release are based
on the Company's beliefs and expectations as of the date of this
release and are subject to certain risks and uncertainties which may
have a significant impact on the Company's business, operating results
or financial condition. Should any risk or uncertainty materialize, or
should underlying assumptions prove incorrect, actual results or
outcomes may vary materially from those described in forward-looking
statements.

CDW Corporation
Gary Ross
(847) 371-5048
garyross@cdw.com
or
Ogilvy Public Relations
Anshula Ahluwalia
(312) 397-6074
anshula.ahluwalia@ogilvypr.com

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