This record contains four (4) Standard Modular System (SMS) cards type: N to N Power Driver (4 to 10 bases). This card was used with the IBM 7090 system. The circuit card is made of an epoxy paper laminate material.
Date
Circa 1959
Manufacturer
International Business Machines (IBM)
Identifying Numbers
Other number
DM YQ
Card Code. Etched on side edge of board, component side
Other number
EC 105815
Etched on side edge of the other two boards, component side. Possibly an 'engineering change' number
Other number
EC 108712
Etched on side edge of two boards, component side. Possibly an 'engineering change' number
Part number
371349
IBM part number. Etched on side edge of board, component side
