What is a computer ? let's know...

A Computer is an electronic machine that can solve most different problems of mathematical , store and retrieve data and perform calculations faster and efficiently than humans . Computers are used as control systems . The first computer type was a supercomputer . It was the worlds first computer . Right now in 2018 the computers are more powerful with strong programs . In report of 2013 mobile computers are become dominating device on the market with 237 million devices.