INTERACTIVE WRISTWATCH CALCULATORAbstract of the DisclosureAn apparatus is disclosed comprising an electronic wrist-watch and a multifunction electronic calculator in a single wristmountable case having a common display and keyboard. The watchportion of the watch/calculator includes time of day, calendar,stopwatch and alarm functions. Each of these functions can becontrolled from the keyboard on the watch/calculator. Theelectronic calculator portion of the watch/calculator performsthe four standard arithmetic functions: add, subtract, multiplyand divide; and has an extra storage register. The calculatorportion can perform calculations with scalar quantities enteredvia the keyboard or stored in the calculator as well as calcula-tions with time interval and real time data from the watch portion.During the time that calculations are not being performed the cal-culator goes into a sleep or inactive mode in order to minimizethe amount of battery power used by the watch/calculator.
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