Texas Instruments SR-51-II

Texas Instruments SR-51-II
Image: Joe Haupt, CC BY-SA 2.0
The Texas Instruments SR-51-II is a scientific calculator with 8 digits precision and algebraic logic. It has 58 functions, 40 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is 2xAA sealed. The calculator was manufactured in Italy; USA.

Facts at a glance:

Feature Value
Type: Scientific
Functions: 58
Keys: 40
Precision: 8
Logic: Algebraic
Display type: LED
Length: 145mm
Width: 80mm
Thickness: 33mm
Power Source: 2xAA sealed
Country: Italy; USA
Year introduced: 1976
YearDiscontinued: 1977

See other calculators by Texas Instruments