Calculator for example, solve quadratic equations symbolically. The first graphing calculator was the Casio fx-7000G released in 1985. The two leading manufacturers, HP and TI, released increasingly feature-laden calculators during the 1980s and 1990s. At the turn of the millennium, the line between a graphing calculator and a handheld computer was not always clear, as some very advanced calculators such as the TI-89, the Voyage 200 and HP-49G could differentiate and integrate functions, solve differential equations, run word processing and PIM software, and connect by wire or IR to other calculators/computers. The HP 12c financial calculator is still produced. It was
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