This is a guide to some of the terminology and jargon that is used in the world of computers and websites. If you come across something that isn't explained, please tell us and we'll add it to the list.

Bug

A problem, usually in a program that means it will not run as intended. Bugs are often fixed in later updates of the same software. The first recorded computer bug (1945) was a moth trapped in the points of Relay #70, Panel F of the Harvard University Mark II Aiken Relay Calculator. The term had been used previously, including in an 1896 electrical handbook: "The term bug is used to a limited extent to designate any fault or trouble in the connections or working of electric apparatus."

Cache

A storage area for frequently or recently used information. It allows you to access the information quickly should you need it again. For example, if you go back to a website that you have recently visited, your PC will usually display all or parts from a cache on your hard disk. This means you don't need to download it from the Internet again, saving time.

Domain name

A unique name on the Internet, owned by a person or company, for example, csuk-solutions.net. See also: answers.com

Internet

A vast network of interconnected computers. It evolved from ARPANet, a US Department of Defense project started in 1969. Until 1995 the Internet was a scientific/academic network, and only became a commercial venture in 1995. Many of the protocols developed for communication on the Internet in the 70s and 80s, such as TCP/IP and SMTP are still in use today.

World Wide Web / WWW / The Web

A way of accessing infomation over the Internet. The web uses a network of Internet servers that hold documents formatted in HTML; these contain text, graphics, audio and video. Your browser asks for a web page to be sent to your computer and allows you to view the formatted HTML page. The web is only a part of the Internet: email, news groups, FTP and instant messaging use the Internet not the Web.