It was Charles Babbage
Jef Raskin
1812
it was an astronomical calculator. A form of mechanical analog computer. The nordon bombsight was also a form of mechanical analog computer.
1972
abacus is the first manual mechanical calculator
Made by Charles Babbage and evloved into a calculator
mechanical mouse
The last famous electromechanical computer was:
abacus
What is Computer
Charles Babbage
Sperry built the first mainframe computer about 1950, soon followed by IBM. In the beginning it was envisioned that only about six computers could be usefully employed, for example, by the Bureau of the Census, the Internal Revenue Service, the Department of Defense.