Texas Instruments TI‑50


Brand: Texas Instruments
Model: TI-50
Type: Scientific calculator
Picture: TI-50
Batteries: LR 44 x 2
Lifetime: Introduced: 1978
Terminated: unknown
Notes: Texas Instrument's version of a 'practical and robust school calculator'. Basically equivalent to the equivalent TOSHIBA and CASIO series.

This one has two constant memories.

The problem with this calculator was that after using this calculator for a while the keys would start to bounce. This was a problem with a lot of the TI calculators of similar design, before the invention of rubber key switches. The battery compartment of this calculator isn't very practical either, and the flexprint under which the two batteries reside breaks easily rendering the calculator useless.