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UNIX
UNIX is the trademarked name of the multi-user, multitasking, time-sharing operating system developed at AT&T's Bell Labs in 1969. Many web sites are maintained on UNIX systems. While technically the name UNIX refers to only a few trademark-licensed versions, it is often used to refer to the many versions currently available on the market. The differences to the user are slight.
URL
An acronym for Uniform Resource Locator, a URL is the address for a resource or site (usually a directory or file) on the World Wide Web and the convention that web browsers use for locating files and other remote services.
USENET
A world-wide system of discussion groups, with comments passed among hundreds of thousands of machines. Not all USENET machines are on the Internet. USENET is completely decentralised, with over 10,000 discussion areas, called newsgroups.
User Name
Your user name, also called user ID or account name, is the same as your login name. This is the name by which you and your electronic mailbox are identified online.
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