Calculator watches first appeared in the Mid 1970s introduced by Pulsar (1975, then a brand of the Hamilton Watch Company)[1][2] and Hewlett Packard. Several watch manufacturers have made calculator watches over the years, but the Japanese electronics company Casio produced the largest variety of models. Thus, Casio is considered the main player in CWs. 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. Currently, Casio sells only a few "pure" CWs (e.g. CA-53W) and considers a calculator as merely a function on their Databank watches. The eData version of its Data Bank watch, featuring the aforementioned storage capabilities, also has greater memory and the ability to store computer passwords.
CALCULATOR IN MOBILE!
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