CASIO COMPUTER CO., LTD was got it start by developing all-electric compact calculator. Company founder Tadao Kashio, originally an engineer specializing in fabrication technology, founded Kashio Seisakusho in April, 1946 after work experience that included plants manufacturing products for the military.
Kashio Seisakujo manufactured aircraft parts and other products. Toshio, the founder's brother suggested that the company work on developing a calculator. Tadao worked together with his three younger brothers and launched the efforts aimed at producing a calculator.

Most calculators at that time were electrical devices, in which electrical power was used to drive internal gears. The four Kashio brothers, however, adapted the relay elements used for telephone switching equipment to develop the compact, all-electric calculator. The new calculator did not rely on mechanical movements such as gears. The launch of the initial Model 14-A was in June 1957, which also marked the establishment of CASIO COMPUTER CO., LTD.

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