0000950137-05-009814 10-Q 6 20050630 20050808 20050808 CDW CORP 0000899171 5961 363310735 IL 1231 10-Q 34 000-21796 051006680 200 N MILWAUKEE AVE VERNON HILLS IL 60061 8474656000 200 N MILWAUKEE AVE VERNON HILLS IL 60061 CDW COMPUTER CENTERS INC 19930322 10-Q 1 c97485e10vq.htm QUARTERLY REPORT EX-10.1 2 c97485exv10w1.htm REVOLVING NOTE EX-31.1 3 c97485exv31w1.htm CERTIFICATION OF CHIEF EXECUTIVE OFFICER EX-31.2 4 c97485exv31w2.htm CERTIFICATION OF CHIEF FINANCIAL OFFICER EX-32.1 5 c97485exv32w1.htm CERTIFICATION OF CHIEF EXECUTIVE OFFICER EX-32.2 6 c97485exv32w2.htm CERTIFICATION OF CHIEF FINANCIAL OFFICER