Rand 409

Remington Rand 409

The Remington Rand 409 plug-board programmed punch card calculator, designed in 1949, was sold in two models: the UNIVAC 60 (1952) and the UNIVAC 120 (1953). The model number referred to the number of decimal digits of vacuum tube memory storage provided for data.

The machine was designed in "The Barn", at 33 Highland Ave. in Rowayton, Connecticut, a building that currently houses the Rowayton Public Library and Community Center.

These machines were discontinued when the UNIVAC 1004 was introduced in 1962. About 1000 total had been produced by 1961.

Architecture

Numbers were fixed point variable length (1 to 10 digits). Arithmetic was done in floating point, but all results were converted to fixed point when stored in memory.

Digits are represented in bi-quinary coded decimal. Each digit of memory storage contained 5 tubes, representing the digits 1, 3, 5, 7, and 9.

Digit 1 3 5 7 9
0
1 *
2 * *
3 *
4 * *
5 *
6 * *
7 *
8 * *
9 *

See also

External links

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