each stage.

Selected models and timeline

Hollerith's first tabulators were used to compile mortality statistics for Baltimore, Jersey City and New York City in 1886.

The first Tabulating Machine Company (TMC) automatic feed tabulator, operating at 150 cards/minute, was developed in 1906.

The first TMC printing tabulator was developed in 1920.

TMC Type IV Accounting Machine (later renamed the IBM 301), from the :

The 301 (better known as the Type IV) Accounting Machine 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.

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