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
Crescent Electric Supply Co. Crescent Electric Supply Co. Crescent Electric Supply Company is an American electrical hardware supplier. It was founded in 1919 in Dubuque, Iowa, but is currently headquartered in East Dubuque, Illinois. One of the largest companies of its kind, Crescent Electric Supply was ranked by "Forbes" as the 435th largest privately held company in the United States in 2008. Electric contractor Titus B. Schmid founded Crescent Electric Supply in Dubuque, Iowa, in April 1919. Schmid believed that he could deliver goods through the river from St. Louis or Minneapolis to Dubuque faster then existing electronics manufacturers. A 1957 article in "BusinessWeek"