Columbia University Computing History
The IBM 557 Alphabetic Intepreter
The IBM 557 Alphabetic Intepreter, with plugboard chamber open and
plugboard showing. Purpose: to print characters across the top of each
card corresponding what is punched in each column. The Interpreter was
normally used with decks that were output by an online punch or a reproducing
punch, or produced in a key punch with a dry or missing ribbon. Custom
functions could be programmed on the plugboard.
for more about plugboards.
Photo: Found at a
Finnish computing history website (tietokonemuseo.saunalahti.fi, now