The APF MARK 90 is a programmable calculator with 8 digits precision and algebraic logic. It has 45 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is 3xSealed.

Facts at a glance:

Feature Value
Type: Programmable
Keys: 45
Precision: 8
Logic: Algebraic
Display type: LED
Length: 152mm
Width: 76mm
Thickness: 25mm
Power Source: 3xSealed
Year introduced: 1977

See other calculators by APF