Monroe 99

Monroe 99
Image: wass.net used with permission
The Monroe 99 is a scientific calculator with 8 digits precision and algebraic logic. It has 28 functions, 37 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAA.

Facts at a glance:

Feature Value
Type: Scientific
Functions: 28
Keys: 37
Precision: 8
Logic: Algebraic
Display type: VFD
Length: 165mm
Width: 83mm
Power Source: 4xAA
Year introduced: 1973

See other calculators by Monroe