Blaise Pascal is often credited with invented the first calculator type machine around 1641. For more info see the following website: http://inventors.about.com/library/inventors/blpascal.htm Although a slide rule which is a more primative type of calculating machine was invented by a guy named W. Oughtred in 1632.
1623: German Mathematician Wilhelm Schickard developed the first mechanical calculator
French Physicist, Mathematician and Philosopher Blaise Pascal invented the first mechanical calculator.
abacus Casio made the first graphing calculator in 1985.
he discovered geometry and constructed a calculator
The Sumlock ANITA calculator was the first all electronic calculator made in 1961 by the Bell Punch Co. in Britain.
made for everyone and first it was made for math teachers and sciences
i wouldn't know