This record contains two (2) Standard Modular System (SMS) cards type: Three-Way or Type A (both loads). This card was used with the IBM 7090 system. The circuit card is made of an epoxy paper laminate material. "BAD" is handwritten on both cards.
Date
Circa 1959
Manufacturer
International Business Machines (IBM)
Identifying Numbers
Other number
DF ZA
Card and Program Cap Connection Code. Stamped on side edge of board, component side
Other number
EC 111061
Stamped on side edge of both boards, component side Possibly an 'engineering change' number
Part number
371340
IBM part number. Stamped on side edge of board, component side
