UNIX: The most common operating system for servers on the Internet. UNIX systems are designed to be used by many people at the same time and have TCP/IP built in.

Upload: The process of transferring data from a local computer to a remote computer. When you copy a file from your computer to a computer on the Internet, you are "uploading" that file.

URL: (Uniform Resource Locator) - The standard method of giving the address for any resource on the WWW. A URL might look like this: http://www.example.com/examples.html. The most common use of a URL is to enter it in a web browser to access that page on the Internet.

USENET: A distributed bulletin board system that runs on news servers, UNIX hosts, online services and bulletin board systems. Collectively, USENET is made up of all the users who post to and read newsgroup articles. The USENET is the largest decentralized information utility available today.

UUENCODE: (Unix to Unix Encoding) - A method for converting files from Binary format to ASCII text so that they can be sent across the Internet via email.