1. CDW G

Serial Number: 76246833
Owner: (REGISTRANT) CDW Computer Centers, Inc. CORPORATION ILLINOIS 200 N. Milwaukee Avenue Vernon Hills ILLINOIS 60061

(LAST LISTED OWNER) CDW LLC LIMITED LIABILITY COMPANY ILLINOIS 200 N. MILWAUKEE AVENUE VERNON HILLS ILLINOIS 60061

Filed on: 04/26/2001

2. CDW-G

Serial Number: 76247183
Owner: (REGISTRANT) CDW Computer Centers, Inc. CORPORATION ILLINOIS 200 N. Milwaukee Avenue Vernon Hills ILLINOIS 60061

(LAST LISTED OWNER) CDW LLC LIMITED LIABILITY COMPANY ILLINOIS 200 N. MILWAUKEE AVENUE VERNON HILLS ILLINOIS 60061

Filed on: 04/26/2001

3. CDW-G @ WORK A CDW-G WEB SITE BUILT FOR YOU

Serial Number: 76247181
Owner: (REGISTRANT) CDW Computer Centers, Inc. CORPORATION ILLINOIS 200 N. Milwaukee Avenue Vernon Hills ILLINOIS 60061
Filed on: 04/26/2001

4. CDW-G@WORK

Serial Number: 76246835
Owner: (REGISTRANT) CDW Computer Centers, Inc. CORPORATION ILLINOIS 200 N. Milwaukee Avenue Vernon Hills ILLINOIS 60061

(LAST LISTED OWNER) CDW Corporation CORPORATION ILLINOIS 200 N. Milwaukee Avenue Vernon Hills ILLINOIS 60061

Filed on: 04/26/2001

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