Hewlett-Packard HP 15C (Voyager 1.5)

Hewlett-Packard HP 15C
Image: Wikimedia CC BY-SA 3.0
The Hewlett-Packard HP 15C is a programmable calculator with 10 digits precision and RPN (reverse polish notation) logic. It has 133 functions, 39 keys, and an LCD (liquid crystal) display. The power source is 3x1.5V cell.

Facts at a glance:

Feature Value
Type: Programmable
Functions: 133
Keys: 39
Precision: 10
Logic: RPN
Display type: LCD
Length: 128mm
Width: 79mm
Thickness: 15mm
Weight: 110g
Power Source: 3x1.5V cell
Year introduced: 1982
YearDiscontinued: 1989

See other calculators by Hewlett-Packard