A person who intrudes or 'hacks' in to systems they are not supposed to. This is done for a variety of reasons including looking for peoples financial details or insider information on a comapy's dealings. Sometimes people hack just to irritate you. One of the commonest methods of Hacking is through social engineering to learn usernames and passwords you use, or by searching through your houshold or business waste looking for bank details or other identity documants.

Email that is not considered to be spam.

Also known as the Hard Drive. This is a computers main storage area that holds your operating systems, programs and documents. All Computers are fitted with one or more Hard Discs.

Any Physical part of your computer, such as the Monitor or CPU.

A technique used in which the internet is scanned looking for email addresses which are added to spammers mailing lists.

An anti-virus program that works by applying general rules about how viruses behave in order to detect them.

An untrue virus warning often communicated by email. Hoaxes can often be more damaging than a genuine virus, as people often follow the instructions in hoaxes telling them to delete critical files needed for the computer to function correctly.

The first page of any website. The first web page that appears when you open your Browser is also known as the Homepage.

An online advert or link that when clicked, changes your browser homepage to that of an advertisers website without your permission.

A trap set up on the internet by a computer system, used to lure and trap spammers and Hackers.

Hyper Text markup Language. This is the code in which most web pages are written. The Browser reads the HTML and interprets it as it is meant to be displayed. Tim Berners-Lee is credited with creating the first Browser and web server, then subsequently realeased the specifications for HTML, HTTP and UDI's, which are now known as URLs.

Stands for Hyper Text Transfer Protocol, and is the language computers use to display web pages over the internet.

The scanning of HTTP traffic to ensure web pages and downloads are virus free.

An item of Hardware that allows multiple computers to be linked together to create a Network.

A type of Link on a webpage. When clicked it can take you to another part of the page you are on, another part within the website, or to a new webpage.

Compter readable text which allows extensive Hyperlinks.