The first computer was invented in 1822 by Charles Babbage. At that time that computer was 11 feet’s. Its weight is 5 tones. It consist of 8000 different parts. It was a calculator to calculate different equation but was big and electronic so was known by the name Computer. It has two different engine in it but unfortunately Mr. Charles was not able to complete its engine. The best thing of this computer is that it can calculate decimal figures as well. It has the speciality of using gear in place of numbers thus every number has its own gear. The best computer of all time.