0000899171-05-000063 3 1 20050906 20050906 20050906 CDW CORP 0000899171 5961 363310735 IL 1231 200 N MILWAUKEE AVE VERNON HILLS IL 60061 8474656000 200 N MILWAUKEE AVE VERNON HILLS IL 60061 CDW COMPUTER CENTERS INC 19930322 Berger Dennis G 0001337761 3 34 000-21796 051070918 8474656000 200 NORTH MILWAUKEE AVENUE VERNON HILLS IL 60061 3 1 edgar.xml PRIMARY DOCUMENT