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Calculator watch
A calculator watch is a digital watch with a built in calculator, usually including buttons on the watch face. Calculator watches were first introduced in the 1970s and continue to be produced, despite enjoying a heyday during the 1980s. The most notable brand is the Casio Databank series, though watches made by Timex were also popular.
== History ==
Calculator watches first appeared in the Mid 1970s introduced by Pulsar (1975, then a brand of the Hamilton Watch Company)〔(Going Digital ), ''TIME Magazine'', December 22, 1975〕〔(History of LEDs - Chapter 1 ) at Rensselaer Polytechnic Institute website〕 and Hewlett Packard.
Several watch manufacturers have made calculator watches over the years, such as Pulsar and Timex, but the Japanese electronics company Casio produced the largest variety of models. In the mid-1980s, Casio created the Databank calculator watch, which not only performed calculator functions, but also stored appointments, names, addresses, and phone numbers.
Mass-produced calculator watches appeared in the early 1980s (with the most being produced in the middle of the decade). Calculator watches are generally considered synonymous with the aesthetics and spirit of the 1980s.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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