hardware software keywords 
Description Specifications Can multiply, devide, add and substract. Mechanical device made of copper and steel. Carriage is performed with a stepped wheel, which mechanism is still in use today. Chronology Contrary to Pascal, Leibniz (16461716) successfully introduced a calculator onto the market. It is designed in 1673 but it takes until 1694 to complete. The calculator can add, subtract, multiply, and divide. Wheels are placed at right angles which could be displaced by a special stepping mechanism. The speed of calculation for multiplication or division was acceptable. But like the Pascaline, this calculator required that the operator using the device had to understand how to turn the wheels and know the way of performing calculations with the calculator.(2)

Last Updated on June 11, 2006  For suggestions please mail the editors 
Footnotes & References
1  www.idv.unilinz.ac.at/bueroaut/mechan/fmechueb.htm 
2  http://www.lv.psu.edu/OJJ/courses/ist240/reports/spring2001/facbbckf/12001940.html 