What is computer? A computer is an electronic device that is capable of receiving, processing, and storing data. It can perform various operations on the data, such as calculations, sorting, searching, and displaying information. Computers come in many different forms, including desktops, laptops, tablets, and smartphones. They are used for a wide range of tasks, such as communication, entertainment, education, business, and scientific research. Modern computers are powered by microprocessors, which are small chips that contain millions of transistors and are capable of performing billions of calculations per second.