Updated: 12/30/2019 by Computer Hope
A computer is a programmable device that stores, retrieves, and processes data. The term “computer” was originally given to humans (human computers) who performed numerical calculations using mechanical calculators, such as the abacus and slide rule. The term was later given to a mechanical device as they began replacing the human computers. Today’s computers are electronic devices that accept data (input), process that data, produce output, and store (storage) the results.
Below is a picture of a computer with each of the main components. In the picture below, you can see the desktop computer, flat-panel display, speakers, keyboard, and mouse. We’ve also labeled each of the input devices and output devices.
History of the computer
The first digital computer and what most people think of as a computer was called the ENIAC. It was built during World War II (1943-1946) and was designed