This was, basically, a hand-operated mechanical calculator. He took nine years to build a part of the machine. This machine, which is in the London Science Museum, can make complex mathematical calculations. It is a basic mechanical computer. Babbage dreamed however of more complicated machines. read more
Quick Answer. Charles Babbage invented the first general-purpose computer in an effort to prevent the mathematical errors that were prevalent in the human-calculated mathematics of his time. read more