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Need help? Do you have a question about the V.P.A.M. fx-100s and is the answer not in the manual?. The Casio Story: With the launch of its first watch in November 1974, Casio entered the wristwatch market at a time when the watch industry had just discovered digital technology. As a company with cutting-edge electronic technology developed for pocket calculators, Casio entered this field confident that it could develop timepieces that would lead the market.CASIO FX-100s V.P.A.M SCIENTIFIC.