Brand: CASIO
Model: SL-300
Type: Calculator
Picture: CASIO LC-300
Batteries: Solar cell
Lifetime: Introduced: 1981
Terminated: unknown
Notes: Small, plain calculator running on solar power. Does not need a lot of light, powers on under incandescent light.

A nice touch are extra markers on its screen. A small symbol on the right shows the last operation. A small "k" is shown at the left when an operator is pressed twice to start constant operations (repeating the last action).

Many thanks to Richard Pilkington of the University of Salford for donating this calculator to the museum.