HD Executive 2200 S 79/80


Brand: HD
Model: Executive 2200 S 79/80
Type: Calculator
Picture: HD Executive 2200 S 79/80
Batteries: LR 44 x 2
Lifetime: Introduced: 1979?
Terminated: unknown
Notes: I’m not sure whether the manufacturer is indeed "HD" because I can’t find any references to that brand name as a calculator manufacturer on the Internet. Still, this calculator as a spectacular type designation: "Executive 2200 S 79/80".

The calculator itself is a plain calculator with added functions for squares, square roots and reciprocals. It also has constant memory.