Information from the Calculator.org website
The Casio fx-502P is a programmable calculator with 10 digits precision and algebraic logic. It has an unknown number of functions, 50 keys and one of the early LCD (liquid crystal) displays which incorporated a yellow filter. The power source is 2xCR2032 3V. The calculator was manufactured in Japan.
Facts at a glance:
This exhibit has a reference ID of CH48156. Please quote this reference ID in any communication with the Centre for Computing History.