IBM 702 system: From left to right, CRT memory, 702 CPU, 717 printer, operator's console, 757 printer control unit, 752 tape control unit, five 727 tape drives, 732 drum storage, five 727 tape drives, card reader, card punch, and reader/punch control units. (From A THIRD SURVEY OF DOMESTIC ELECTRONIC DIGITAL COMPUTING SYSTEMS from the BRL at Aberdeen Proving Ground).