Hewlett-Packard HP 45 (Classic WIZARD)

Hewlett-Packard HP 45
Image: Joe Haupt, CC BY-SA 2.0
The Hewlett-Packard HP 45 is a scientific calculator with 12 digits precision and RPN (reverse polish notation) logic. It has 56 functions, 35 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is 3xAA.

Facts at a glance:

Feature Value
Type: Scientific
Functions: 56
Keys: 35
Precision: 12
Logic: RPN
Display type: LED
Length: 147mm
Width: 81mm
Thickness: 33mm
Weight: 255g
Power Source: 3xAA
Year introduced: 1973
YearDiscontinued: 1976

See other calculators by Hewlett-Packard