0000950137-05-002605 8-K 1 20050303 7.01 20050303 20050303 CDW CORP 0000899171 5961 363310735 IL 1231 8-K 34 000-21796 05657395 200 N MILWAUKEE AVE VERNON HILLS IL 60061 8474656000 200 N MILWAUKEE AVE VERNON HILLS IL 60061 CDW COMPUTER CENTERS INC 19930322 8-K 1 c92786e8vk.htm CURRENT REPORT