The IBM 2741 Terminal


(NEED BETTER PHOTO) (here's one at IBM) (here's another image)

The IBM 2741 was a Selectric typewriter embedded in a small-desk-size cabinet crammed with electronics and wire bundles, communicating at 134.5 bits per second, half duplex. When it was the computer's turn to transmit, it physically locked the keyboard. The print element (not visible in this photo) resembled a golf ball, and was replaceable with other Selectric balls -- italics, APL, and so on. Date: About 1965.


Most recent update: Sat Feb 14 09:58:57 2015

Frank da Cruz / / Columbia University Computing History / Jan 2001