Stands for Redundant Array of Independent Discs, although it used to stand for Redundant Array of Inexpensive Discs. RAID is away of storing data on multiple Hard Discs, which the Operating System sees as one large Hard Disc. RAID is a common method of storage used on Servers.

Stands for Random Access Memory. The RAM stores the data of whatever you are currently working on, and is lost when the computer is turned off. The fastest and most cost effective way of improving an old computer is to add more RAM.

A security feature of some anti spam software. A RBL rejects all mail, whether spar or not, from email addresses known to be spam sender or host spammers.

A method of checking an emails sender address against a Domain Name Systems database to authenticate that the email is from a valid domain or web address.

Stands for Read Only Memory. This is information that can be read, but not changed.

A piece of Hardware that connects computers together to form a Network. Like a Hub but more powerful.

Stands for Rich Text Format. A text document where styling can be applied to the text, but does not however support Macros so it cannot pass on Macro Viruses.