CASIO Memory-8A

Japan- 1975

Four functions,
Mem. functions
Sqr Root, %
"1975 was a big year for Casio and in July a personal eight digit calculator with memory and square root, plus percentage key, the Memory 8A was introduced. This machine used a MicroPD977C Chip and LD8120 Flouro Display."
Ray Mackay, Old Casio Calculators

Source: Ray Mackay

X-Number World of Calculators