IBM 550

The IBM 550 numerical interpreter was the first commercial machine made by IBM that read numerical data punched on cards and printed it across the top of each card.

[1] Information to be printed could be placed in any sequence via plugboard control panel selections.

The machine operated at the rate of 75 cards a minute.

Alphabetic and numeric characters could be printed by the Type 552 alphabetic interpreter, announced in 1937.

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