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Old Calculator Museum Advertising & Documentation Archive
Sharp Compet 20 (CS-20A)

Early advertisement for the Hayakawa Electric Sharp Compet 20 (CS-20A)
Electronics Magazine, June, 1966

The Sharp Compet 20 was Hayakawa Electric's (Sharp) second electronic calculator, introduced in Japan in the fall of 1965. The Compet 20 was the first calculator made by Hayakawa Electric Co., Ltd. that was exported for sale outside of Japan, with Australia being the first country that imported the machine. By the early spring of 1966, the machine was being directly exported to the US and proved to be a very strong seller amidst a small group of American manufacturers in the rapidly-growing electronic calculator marketplace.

The Compet 20 is a four-function calculator with fourteen digits of capacity, automatic or fixed decimal point, and negative number capability.

To learn more about the Compet 20, see the Old Calculator Web Museum exhibit: Sharp Compet 20.