Computer is an electronic device that accepts data as input, processes it, and provides output according to a set of instructions. It uses hardware and software where hardware are the physical parts and software are the instructions. Computers have evolved through 5 generations from using vacuum tubes to today's microprocessors and artificial intelligence. Computers provide many benefits but also some negatives like health issues. Computers are widely used in various fields like business, education, medical, defense, government, industries and more. They help with tasks like communication, data storage, analysis, automation and more.