Software Systems software

Software is the programs that are run on computer hardware. There are two different types of software: systems software and applications software.

Part ofComputer ScienceHardware and software

Systems software

Systems software helps run and maintain the computer. It includes the , and .

Operating system

The biggest part of systems software is the operating system. It is an essential part that allows other systems software, and , to communicate with .

All computers have an operating system. They cannot operate without one.

The operating system is needed to perform a number of tasks. It provides a , manages the use of memory and the opening, closing, saving and deleting of files. Most operating systems have features that look after the security of the computer with usernames and passwords.

Examples of operating systems include Windows, Mac OS, Linux, Chrome OS and, on smartphones and tablets, Android and iOS.

A command line interface, mobile user interface and graphical user interface
Figure caption,
A computer won't work without an operating system