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Hewlett-Packard HP 81 Classic

The Hewlett-Packard HP 81 Classic is a finance calculator with 12 digits precision and RPN (reverse polish notation) logic. It has 11 functions, 43 keys and an LED (light-emitting diode) display, typical of calculators of this era. The power source is Mains.

Facts at a glance:

Type Finance
Functions 11
Keys 43
Precision 12
Logic RPN
Display type LED
Display size
Printer Y
Length 390 mm
Width 275 mm
Thickness 137 mm
Weight 6000 g
Power Source Mains
Original price unknown
Est. current value unknown
Year introduced 1973
Year discontinued 1978

See other calculators manufactured by Hewlett-Packard.