0000950137-07-011011 10-Q 5 20070630 20070801 20070801 CDW CORP 0000899171 5961 363310735 IL 1231 10-Q 34 000-21796 071015925 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 c17210e10vq.htm QUARTERLY REPORT EX-31.1 2 c17210exv31w1.htm CERTIFICATION OF CHIEF EXECUTIVE OFFICER EX-31.2 3 c17210exv31w2.htm CERTIFICATION OF CHIEF FINANCIAL OFFICER EX-32.1 4 c17210exv32w1.htm SECTION 1350 CERTIFICATION OF CHIEF EXECUTIVE OFFICER EX-32.2 5 c17210exv32w2.htm SECTION 1350 CERTIFICATION OF CHIEF FINANCIAL OFFICER