FACOM 201

FACOM 201 computer with parametron logic elements

FACOM 201 computer with parametron logic elements


Manufactured in 1960
Manufactured by Fuji Tsushinki Manufacturing Corporation (Now, Fujitsu Limited)
Owner Tokyo University of Science
Location of historical materials Museum of Science of Tokyo University of Science.,
1-3, Kagurazaka, Shinjuku-ku, Tokyo, 162-8601 Japan
Visitor information Open to the public
Contact Science Museum of Tokyo University of Science
Tel.+81-3-5228-8224 http://www.tus.ac.jp/info/setubi/museum/

In 1957, the first parametron computer, MUSASHINO-1 was developed by Nippon Telegraph and Telephone Public Corporation (now, Nippon Telegraph and Telephone Corporation). The parametron computer exhibited here was introduced in Tokyo University of Science in 1960 as an improved, commercial model of MUSASHINO-1B, FACOM 201, produced by Fuji Tsushinki Manufacturing Corporation.

The parametron, invented in Japan as an original, unique logic element, was used in a number of Japanese computers as a cheap and robust logic unit in the transition period from the vacuum-tube era to the transistor era. It is of tremendous value as technological heritage. Approximately 6,000 parametron units are used in this computer.

This computer was utilized in Tokyo University of Science for the purposes not only of scientific computations but also of technology developments such as “effects of the shape of a small rocket on the propulsion by solid fuel combustion” and “theoretical computations of the strength of car-body structures”. Furthermore, it was employed for the education of computer technology and contributed to training of engineers.

This computer is preserved and exhibited in Science Museum of Tokyo University of Science in its original form with the input-output units.