Enterprex SR-55 (Jr. Sliderule and Electric Sliderule)

The Enterprex SR-55 is an arithmetic calculator with algebraic logic. It has 12 functions, 30 keys, and a VFD (vacuum fluorescent) display. The power source is 2xAA.

Facts at a glance:

Feature Value
Type: Arithmetic
Functions: 12
Keys: 30
Logic: Algebraic
Display type: VFD
Length: 146mm
Width: 76mm
Power Source: 2xAA
Year introduced: 1975

See other calculators by Enterprex