Hewlett-Packard-01 wrist instrument, 1977

HP Virtual Museum: Hewlett-Packard-01 wrist instrument, 1977. The HP-01 wrist instrument looked like a digital watch but was smarter than many pocket calculators. It performed more than three dozen functions to manipulate and interrelate time, calendar and numeric data. With six interactive functions (time, alarm, timer/stopwatch, date/calendar, calculator and memory)...