In 1957, Casio has released a calculator compact 14-A at a price of 485,000 yen [1], which works with electricity alone, is a world first. Using the technology as the basis Relays And in the same year Casio has enhanced the company Casio Computer Co., Ltd. in the decade to 1980, Casio has been a dramatic increase in popularity. The disposal of electronic instruments and electric keyboard instruments.
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