ADVISORY/CDW and LABI to Make Announcement Concerning Gulf Coast Small Businesses; Hurricane-Damaged Small Businesses Left with Burden of Funding Rebuilding Efforts.

CDW Corporation (NASDAQ:CDWC):

- Press Conference -

THE BIG PICTURE:  This year's catastrophic hurricanes left hundreds of
                  thousands of small businesses destroyed and their
                  employees displaced throughout Alabama, Louisiana,
                  Mississippi and Texas.

                  The facts:
                     --  A record $2.96 billion has been raised in
                         fewer than four months to help victims of
                         this year's Gulf Coast hurricanes and yet
                         little is earmarked specifically to help
                         small businesses (Source: Center on
                         Philanthropy, Indiana University)
                     --  Small businesses create two-thirds of new
                         private sector jobs in America, employ more
                         than half of all workers, and account for
                         more than half of the output of our economy
                         (Source: White House report on Supporting
                         America's Small Businesses)
                     --  Small businesses represent more than 99.7
                         percent of all employers in the United States
                         (Source: SBA Office of Advocacy)
                     --  According to the U.S. Census Bureau, 205,995
                         small businesses exist in the four states
                         affected by Hurricanes Katrina and Rita,
                         creating a large need for funds

                  However, red tape associated with current relief
                  loan programs has left many small businesses to find
                  financial assistance alternatives.

                  CDW Corporation (NASDAQ:CDWC), a leading provider of
                  name-brand technology products and services to
                  businesses, and the Louisiana Association of
                  Business and Industry (LABI), Louisiana's premier
                  business association, will make an announcement at
                  10:30 a.m. CST on Tuesday, December 20, addressing
                  this concern.

WHEN:             Tuesday, December 20, 2005
                  Press conference begins at 10:30 a.m. CST

WHERE:            Sun Interiors, Ltd.
                  2329 Severn Ave.
                  Metairie, LA
                  (Approx. 9 miles from New Orleans airport)

WHAT:             Press conference unveiling news from CDW and the
                  Louisiana Association of Business and Industry
                  (LABI) at Sun Interiors.

LIVE AUDIO FEED:  A listen-only live audio feed of the press
                  conference will be available to reporters from 10:15
                  a.m. CST. The dial-in number for the broadcast is
                  800-230-1951. Please enter confirmation code 810591.

AVAILABLE         -- John Edwardson, CEO and chairman, CDW
INTERVIEWS:       -- CDW coworkers volunteering in the Gulf Coast
                  -- Carl Franzella, co-owner, Sun Interiors
                  -- Daniel Juneau, president, LABI
                  -- Maura Donahue, chairperson, U.S. Chamber of
                     Commerce

MEDIA             Betsy Ringham (will be on-site)
CONTACT:          Burson-Marsteller for CDW and LABI
                  Office: 312.596.3491, Mobile: [phone]
                  Email: [e-mail]