Casio (1s, 10s, 100s, etc ... ) had nine keys. Another distinguishing innovation was the use of a single display window instead of the three display windows (one for each argument and one for the answer) used in other calculators. Casio Computer Co., Ltd. was formed in June 1957. That year, Casio released the Model 14-A, sold for 485,000 yen, the world's first all-electric compact calculator, which was based on relay technology. In the 1980s, its budget electronic instruments and its line of affordable home electronic musical keyboard instruments became popular. The company also became well known for the wide variety
APF Electronics Inc. math learning tool and standard calculator, but it has 6 different overlays that convert it into one of several games. APF Imagination Machine II was a computer-video game console hybrid that was in the final development stages around 1983. It was more powerful and was an all in one unit. The project was canceled. It is unknown if any prototypes exist. The North American video game crash of 1983 caused the project to be canceled and APF, then a publicly traded company, filed for bankruptcy. APF Electronics Inc. APF Electronics, Inc. was a publicly traded company in the United States