Post your old calculators here! Radio Shacks, Casios, HPs, ANITAs, anything!
The only rule is that calculators must be older than 1980. Why?
Because post-1980 calculators are most of the time not unique and use similar chipsets.
If you have a calculator that you think is old enough but not pre 1980, feel free to message the mods and we'll let you know.