A fast way of sending computer data over an ordinary phone line - usually used to provide broadband internet access to homes, schools and offices. To stop a computer reaching something on the internet, to stop a program running, or to stop someone from contacting you on a chat service.
Songs bought from the i Tunes Music Store can't be played on other MP3 players such as those from Creative or Sony. Programs that damage your computer (viruses), steal your personal information (spyware), display unwanted adverts (adware) or expose your computer to hackers (Trojan horses).
A chatroom or other service where an adult is watching the conversations to make sure they do not break the hosting company's policy on online behaviour.
Often used to restrict access to certain web pages when children are using computers.
A cookie is a small file that is sent to a web browser by a server and stored on the user's computer.