0000950137-03-005930 10-Q 5 20030930 20031114 CDW CORP 0000899171 5961 363310735 IL 1231 10-Q 34 000-21796 03999589 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 c80862e10vq.htm QUARTERLY REPORT EX-31.1 3 c80862exv31w1.htm CERTIFICATION OF CHIEF EXECUTIVE OFFICER EX-31.2 4 c80862exv31w2.htm CERTIFICATION OF CHIEF FINANCIAL OFFICER EX-32.1 5 c80862exv32w1.htm CERTIFICATION OF CHIEF EXECUTIVE OFFICER EX-32.2 6 c80862exv32w2.htm CERTIFICATION OF CHIEF FINANCIAL OFFICER