Japan- 1975

Four functions,
Sqr Root, %
"In February of 1975 the inventive nature of Casio came to the fore front and machines began being released in a continuous stream. First the Personal-8 using a MicroPD973C CPU and flouro display. This was followed by a Personal-8M in March. This machine seemed to use a Toshiba T3315 CPU and an E8120. In May this was followed by an extremely small Pocket Mini which was designated the CP-801B (AX-11A-A) It used a MicroPD974C with the display driver on the CPU."
Ray Mackay, Old Casio Calculators

Source: Ray Mackay

X-Number World of Calculators