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IBM 301 Accounting Machine

IBM 301 (Type IV) Accounting Machine

IBM 301 (Type IV) Accounting Machine
Punched card technology was at the heart of data processing through the late 1950s. This machine (better known as the Type IV) was the first card-controlled machine to incorporate class selection, automatic subtraction and printing of a net positive or negative balance. Dating to 1928, this machine exemplifies the transition from tabulating to accounting machines. The Type IV could list 100 cards per minute.