Casio fx-21

Casio fx-21
The Casio fx-21 is a scientific calculator with 8 digits precision and algebraic logic. It has 30 functions, 35 keys, and a VFD (vacuum fluorescent) display. The power source is 2xAA. The calculator was manufactured in Japan. Note: Boots 424; MBO fx-21 picture credit: Enrique García Simón

Facts at a glance:

Feature Value
Type: Scientific
Functions: 30
Keys: 35
Precision: 8
Logic: Algebraic
Display type: VFD
Length: 145mm
Width: 84mm
Thickness: 25mm
Power Source: 2xAA
Country: Japan
Year introduced: 1977
YearDiscontinued: 1977

See other calculators by Casio