FUJIC
FUJIC was the first electronic digital computer in operation in Japan. It was finished in March 1956, the project having been effectively started in 1949, and was essentially built almost entirely by one person – Dr. Okazaki Bunji. Originally designed to perform calculations for lens design by Fuji, the ultimate goal of FUJIC's construction was to achieve a speed 1,000 times that of human calculation for the same purpose – amazingly, the actual performance achieved was double that number.
Employing approximately 1,700 vacuum tubes, the computer's word length was 33 bits. It had an ultrasonic mercury delay line memory of 255 words, with an average access time of 500 microseconds. An addition or subtraction was clocked at 100 microseconds, multiplication at 1,600 microseconds, and division at 2,100 microseconds.
Used extensively for two years at the Fuji factory in Odawara, it was given later to Waseda University before taking up residence in the National Science Museum of Japan in Tokyo.
See also
References and external links
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Wikimedia Commons has media related to FUJIC. |
- FUJIC at the IPSJ Computer Museum
- Dr. Okazaki Bunji at the IPSJ Computer Museum
- FUJIC at the National Science Museum of Japan
- FUJIC's mercury delay line memory at the National Science Museum of Japan
- Raúl Rojas and Ulf Hashagen, ed. The First Computers: History and Architectures. 2000, MIT Press, ISBN 0-262-18197-5.