Hewlett-Packard HP 81 (Classic)

The Hewlett-Packard HP 81 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. Note: Desktop printer version of HP-80

Facts at a glance:

Feature Value
Type: Finance
Functions: 11
Keys: 43
Precision: 12
Logic: RPN
Display type: LED
Printer: Yes
Length: 390mm
Width: 275mm
Thickness: 137mm
Weight: 6000g
Power Source: Mains
Year introduced: 1973
YearDiscontinued: 1978

See other calculators by Hewlett-Packard