The Circle Computer
Written on October 8th, 2025 by Tech Ads
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Page 1
7A
Cercle
GENERAL PURPOSE DIGITAL COMPUTER.
SINGLE Appress Cope
SERIAL OPERATION
Maenetic Drum MEMORY
REPLACEABLE UNIT CHASSES
Two TYPEWRITERS FOR FLEXIBILITY
OF INPUT AND OuTpuT
CONSERVATIVE CIRCUITS FOR
RELIABILITY AND EASE OF
MAINTENANCE-
© DESIGNED FOR CONVENIENT OPERATION
oO ov orc c
DESIGNED BY
NUCLEAR DEVELOPMENT ASSOCIATES INC.
80 GRAND STREET
WHITE PLAINS, N.Y.
BUILT BY
HOGAN LABORATORIES INC.
ISS PERRY STREET
NEW YORK , N.Y.
BOTH WILL BE GLAD TO FURNISH FURTHER INFORMATION
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About
The Circle Computer was an early computer designed by Nuclear Development Associates, Inc. Comprised of 700 valves for computation and a drum-based memory system with a standard capacity of 1024 words of 40 digits and two signs per word. Memory could be expanded to either 2048 or 4096 words. Permanent storage was via punch tape unit which it was capable of both reading and writing from. The unit was a mains power-able box three feet by four feet by six feet that could be mounted on wheels. Standard input/output was via Flexowriter-type electronic typewriters.
The Computer History Museum hosts both a brief overview and a deeper look at the Circle Computer.
Taken from: The Computing Machinery Field (Volume 1, No. 4 (October 1952))