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
Willapa Electric Company Willapa Electric Company The Willapa Electric Company was an electric railway and electric utility company incorporated on August 2, 1913, as successor to the Willapa Harbor Railway, a electric street railway extending from Raymond to South Bend, Washington, in addition to other public utilities in the area: Twin City Electric Company and South Bend Electric Company. The company was to be capitalized at $400,000. The organizers were J S Thornton, R L Fisher and M M Fisher. The company was controlled by the Cities Service Power and Light Company. Rail operations continued until July 1930. In 1939, the company sold