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
Telsen Electric Company Ltd Today, the Aston factory, now The Telsen Centre, has been converted by Midlands Industrial Association Ltd, a registered friendly society to provide Managed Workspace for New Start and small business SME's and managed and let by Prince Warnes Properties. www.prince-warnes.com Telsen Electric Company Ltd Telsen Electric Company was a British electronics company formed in Birmingham in 1924 by Mr. A. Macnamara at 207 Aston Road. In 1930 they moved to 56 Miller Street and shortly after moved to their new factory at the corner of Philips Street and Thomas Street. Incorporated in 1933, the Telsen Electric Company Ltd were manufacturers