the casio calculator watch came out in the 1970s.
the casio calculator watch came out in the 1970s.
when did the casio calculator watch come out?
1970s
most calculator watches contain only a few number of functions such as +, -, x, / and percents. however, there are several models with additional functions: scientific, including transcendent and trigonometry, in models casio cfx-200, cfx-400, citizen 49-9421, and also financial functions (in the casio cba-10).









































usually calculator watch operates with eight digits number, however, calculator watch can operate with 6 digits (for example, casio c-801) or 10 digits (casio cba-10) numbers.









































section::::history.









































calculator watches first appeared in the mid 1970s introduced by pulsar (1975, then a brand of the hamilton watch company) and hewlett packard.
calculator watch
mass-produced calculator watches appeared in the early 1980s, with the most being produced in the middle of the decade. their popularity began to fade in the mid 1990s with the introduction of cheaper mobile phones and pdas which could perform the same functions while being compact. the calculator watch is now a collector item and notable watches such as the time watches and some special variants of casio calculator watches such as the cfx-400 command a high premium in the used market.









































section::::future.
calculator watch