Calculator This led the way to the first credit-card-sized calculators, such as the Casio "Mini Card LC-78" of 1978, which could run for months of normal use on button cells. There were also improvements to the electronics inside the calculators. All of the logic functions of a calculator had been squeezed into the first "calculator on a chip" integrated circuits (ICs) in 1971, but this was leading edge technology of the time and yields were low and costs were high. Many calculators continued to use two or more ICs, especially the scientific and the programmable ones, into the late 1970s. The
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