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Remington Rand 409

Field	Value
name	UNIVAC 60
manufacturer	Remington Rand
release_date
os
online_services
successor	UNIVAC 120

A UNIVAC 120 served as the first computer in [[Boise, Idaho

The Remington Rand 409, a punched card calculator which was programmed with a plugboard, was designed in 1949. It was sold in two models: the UNIVAC 60 (1952) and the UNIVAC 120 (1953). The model number referred to the number of decimal digits it could read from each punched card.

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 and of variable length (one to ten 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 five tubes. Four of these represented the digits 1, 3, 5, and 7, while the fifth tube represented 9 if activated alone but added 1 to the value if activated together with another tube.

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

Hardware

RR 409	model 60	model 120
Number of tubes	?	800
Decimal digits
of storage	?	438
Weight	?	3,230 lb

Notes

References

According to ''Electronic Brains: Stories from the dawn of the computer age'', by Mike Hally, 2005, {{ISBN. 978-0-309-09630-0, p. 69, the Univac 60 could use 60 columns of data from a punched card, whereas the Univac 120 could use 120 columns.
model 120 - see plaque in image

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

programmable-calculators univac-unit-record-equipment vacuum-tube-computers computer-related-introductions-in-1952 remington-rand

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