Keystone 2040

The Keystone 2040 is an arithmetic calculator with algebraic logic. It has a VFD (vacuum fluorescent) display. The power source is Sealed battery pack.

Facts at a glance:

Feature Value
Type: Arithmetic
Logic: Algebraic
Display type: VFD
Length: 152mm
Width: 81mm
Power Source: Sealed battery pack
Year introduced: 1975

See other calculators by Keystone