Ek computer ek machine hae jon ki acchi taraha se paribhasita niyama ka palana karem kar ke information banae hae. Aaj kal iska use har field mae kiya jae hae chahe voh education (siksha) ho, chahe wo military ya phir hospitals aur bahut saare. Is machine ko sabse pehle banane wale aadmi ka naam hae Charles Babbage. Computer k saath ek CPU, Keyboard aur ek Mouse bhi hota hae.