What is computer? The term computer is derived form the word ' Compute '. In simple words, a computer is an electronic device which takes input from the user in the from of data and instructions. Computer Definition. Computer is an electronic device which process information and store data. *History of Computer* In the year 1842 a Greek mathematician " Charles Babbage " invents the "Prototype Engine" it's able to perform addition and multiplication only and very fast compare to other Machine. But in that age it doesn't have any storage capacity or capability. In the year 1946 " Jhan- Wen-Nu-Meb " invents 1st electronic calculating machine. Which is able to perform all the ratios and store data and more faster than any other device. Of that age, his named the machine "EDVAC" i.e [Electronic Discreet Variable And Calculator] and develop that machine in 1950 & 1951 and named UNIAC i.e [Universal Automatic Compu...