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
Sumlock ANITA calculator of models of desktop calculators that followed, which gradually moved to transistor and integrated circuit technology, and from the early 1970s, the hand-held models. In 1966 the calculator manufacturing operation of the Bell Punch Company was formed into a separate company, called Sumlock-Anita Electronics, and continued to manufacture both the mechanical and electronic calculators, still marketed by its Sumlock Comptometer division. There was a major development in 1973 when the Sumlock Anita Electronics division was bought by its main supplier of integrated circuits, Rockwell International of the U.S.A. The remainder of the Bell Punch Co. continued manufacturing and selling its