Sinclair Executive

Sinclair Executive
Image: Wikimedia CC BY-SA 3.0
The Sinclair Executive is an arithmetic calculator with 8 digits precision and algebraic logic. It has 5 functions, 18 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is 4x mercury cell. Note: First Sinclair calculator.

Facts at a glance:

Feature Value
Type: Arithmetic
Functions: 5
Keys: 18
Precision: 8
Logic: Algebraic
Display type: LED
Length: 138mm
Width: 56mm
Thickness: 9mm
Weight: 71g
Power Source: 4x mercury cell
Year introduced: 1972

See other calculators by Sinclair