Tabulating Machine - Models and Timeline

Models and Timeline

Hollerith's first tabulators were used for the U.S. 1890 Census.

The first CTR automatic feed tabulator, operating at 150 cards/minute, was developed in 1906.

The first CTR printing tabulator was developed in 1920.

IBM 301 (Type IV) Accounting Machine: From the IBM Archives:

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.

IBM 401: From the IBM Archives:

The 401, introduced in 1933, was an early entry in a long series of IBM alphabetic tabulators and accounting machines. It was developed by a team headed by J. R. Peirce and incorporated significant functions and features invented by A. W. Mills, F. J. Furman and E. J. Rabenda. The 401 added at a speed of 150 cards per minute and listed alphanumerical data at 80 cards per minute.

IBM 405 (photo): From the IBM Archives:

Introduced in 1934, the 405 Alphabetical Accounting Machine was the basic bookkeeping and accounting machine marketed by IBM for many years. Important features were expanded adding capacity, greater flexibility of counter grouping, direct printing of the entire alphabet, direct subtraction and printing of either debit or credit balance from any counter. Commonly called the 405 "tabulator," this machine remained the flagship of IBM's product line until after World War II.

IBM 402 and 403, from 1948, were modernized successors to the 405.

IBM 407

Introduced in 1949, it was later adapted to serve as an input/output peripheral for a number of early electronic calculators and computers. Its printing mechanism was used with the IBM 1130 through the mid-1970s.

The IBM 407 Accounting Machine was withdrawn from marketing in 1976, signaling the end of the unit record era.

IBM 421

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