What is a computer? What is it for?

Definition / Concept

A computer is a machine or device that performs processes, calculations, and operations based on instructions provided by a software or hardware program. It has the ability to store, retrieve and process data. It is alternatively known as a computer.

What is a computer for?

A computer is used to write documents, create spreadsheets, create presentations, send emails, play games, listen to music, watch videos, surf the Web, and much more.

Computer has become very important nowadays because it is very precise, fast and can perform many tasks easily. Otherwise, completing those tasks manually takes much more time.

Main components of the computer

Computers are designed to run applications and provide a variety of solutions by combining integrated hardware and software components.

Hardware : The physical structure that houses a computer’s processor, memory, storage, communication ports, and peripheral devices.

Software : Includes operating system (OS) and software applications.

Computers work with software programs that are sent to their underlying hardware architecture for reading, interpretation, and execution.


Computers are classified based on power, capacity, size, mobility, and other factors, such as personal computers (PCs), desktops, laptops, minicomputers, handhelds and devices, mainframes, or supercomputers.

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