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
Braun (company) producing film slide projectors, a mainstay of its business for the next forty years. By 1956, Braun was marketing the first fully automatic tray film slide projector, the PA 1. Braun AG slide projectors all utilized a linear or straight tray as opposed to a round-tray design, which allowed the projector to remain small and compact. The 1950s also marked the beginning of the product that Braun is most known for today: the electric shaver. The S 50 was the first electric shaver from Braun. The shaver was designed in 1938, but World War II delayed its introduction until 1951.