A computer is a device that can be instructed to carry out sequences of arithmetic or logical operations automatically. The ability to store and recall information is what makes computers so versatile.

Computers are used in a vast array of applications, from simple tasks like keeping a grocery list to more complex operations like controlling a spacecraft.

Most computers use a combination of software and hardware. The software is the instructions that tell the computer what to do, and the hardware is the physical components that make up the computer.

The most important hardware component is the central processing unit, …