Aristo M400

Aristo M400
Image: used with permission
The Aristo M400 is a scientific calculator with 8 digits precision and algebraic logic. It has 7 functions, 24 keys, and one of the early LCD (liquid crystal) displays which incorporated a yellow filter. The power source is 4x1.5V cell.

Facts at a glance:

Feature Value
Type: Scientific
Functions: 7
Keys: 24
Precision: 8
Logic: Algebraic
Display type: YLCD
Power Source: 4x1.5V cell
Year introduced: 1975

See other calculators by Aristo