Built by the four Kashio brothers (Tadao, Toshio, Kazuo, Yukio) in their small workshop in Tokyo. Toshio, a mechanical engineer, realized that electromagnetic relays could replace gears.
The 14-A used 342 relays to perform 14-digit arithmetic. It was desk-sized (about 120kg) but could multiply, divide, and compute square roots. The clicking of relays was its distinctive "voice."
This was the machine that founded Casio Computer Co., Ltd in 1957.
Keys 0-9, +, -, *, / • Enter/= for result • Watch the relay banks animate! • C to clear