Parametron: 50s Japanese computer that uses neither transistors nor vacuum tubes

In 1954, Eiichi Goto, a graduate student at the University of Tokyo, invented the parametron - a logic element utilizing ferrite cores and parametric oscillation. This innovation marked a turning point in Japan's early computer development and scientific research, as it was less expensive and more reliable than its contemporaries, vacuum tubes and early transistors.

Goto's parametron technology became the cornerstone for the country's first fully programmable stored-program computer, the PC-1, completed in 1958. With 4,200 parametrons, PC-1 outperformed emerging transistor-based systems in terms of stability and had a meticulously crafted instruction set. Its low cost and electrical stability not only shaped Japan's post-war computer industry but also nurtured the nation's first generation of computer engineers.

PC-1, operational since March 1958, left an indelible mark on the Japanese computer industry and scientific community. The parametron’s affordability, minimal maintenance, and exceptional fault tolerance swiftly captured the attention of Japanese industry. Following Goto's initial presentation at a Japanese conference, commercial entities adopted the technology, leading to the development and marketing of computers and calculators based on it.

Eiichi Goto's groundbreaking work earned him the prestigious IRE Browder J. Thompson Memorial Prize in 1961 for his paper on the parametron. He was also awarded the Asahi Prize in 1959 for his contribution to PC-1, highlighting the profound impact of his invention on both industry and academia.