Uplink

The link, or path, from a transmitting earth station to the satellite. The term is typically referring to a transmitting earth station.

Upload

Transferring files or software from one computer to another.

URL

Uniform Resource Locator. The standard form for an address on the Internet. For example, http://www.vase.org/ indicates a Hypertext Transport Protocol (http) address on the World Wide Web (www) with location 'vase' and the type of owner (org). Other valid guidelines may include ftp and gopher. Unlike most e-mail addresses, URLs are always case sensitive, that is, whether a character is upper or lower case does make a difference.

User Interface

The graphic and design components of a Web page that directs users on how to access the information contained in that Web site.