TitleSSEC Wire contact relays
|Other number||#1332||Verso pencil|
Dimensionsoverall: 8 in x 10 in
DescriptionBlack and white image of three wire contact relays . Shows left, front and right sides. " Manufactured by IBM in 1948. Source: The COmputer Museum.
Negative number: R114 - 23A. Description: The SSEC was the first machine that could control its calculating sequence by modifying its own instructions"