Casio 8E

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In 1972, Casio produced its first small, so-called “pocket calculator”, the Mini. With its 6-digit capacity and extremely simplified circuitry, it was delivered at such a low price that it instantly became a worldwide success. After the smaller battery-powered desktop calculators (8U, 101U), the first standard (8-digit) “pocket calculator”, the 8-E, was launched in 1973. Its relatively low consumption was made possible by its American-made chip, but instead of the originally planned imported Bowmar display, it got a display made of large LED elements made by Toshiba, similar to several Japanese contemporary models. For cost-cutting reasons, its keyboard and construction were almost identical to the Mini series. Later, a version with square root function (ROOT-8S) was made in this housing, but after that, due to the rapid development of the Japanese electronic industry, the production of cheap machines made from significantly smaller domestic parts also started at Casio.