A computer is a digital appliance that handles information, runs applications, and carries out functions such as computations, communication, and playing media. It consists of both physical and virtual parts, playing a vital role in work, learning, leisure, and fostering worldwide connections.

Computers and smartphones differ mainly in their size, intended use, and capabilities. Computers are generally larger and cater to complex tasks such as programming and editing, whereas smartphones emphasize mobility, communication, and everyday ease-of-use through touchscreens and mobile applications.