Bitesize has changed! We're updating subjects as fast as we can. Visit our new site to find Bitesize guides and clips - and tell us what you think!

Did you know?

We also have Bitesize study guides covering many subjects at National 4 and National 5 on our Knowledge & Learning BETA website.

Home > Computing Studies > Computer systems > Operating systems

Computing Studies

Operating systems


The operating system



The operating system is a program (set of instructions) which controls a computer whenever it is switched on.

Directory or folder

One part of the operating system organises all the files stored on the disk.

This is done by creating directories or folders in which the user can store the programs and data in an organised form.


BBC navigation

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.