The IBM 601 Multiplying Punch was a unit record machine that could read two numbers from a punched card and punch their product in a blank field on the same card.

The factors could be up to eight decimal digits long.

[1] The 601 was introduced in 1931 and was the first IBM machine that could do multiplication.

[2][3] In 1936 W. J. Eckert connected a modified 601 to a 285 tabulator and an 016 duplicating punch through a custom switch he designed and used the combined setup to perform scientific calculations.

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