Upload
Transferring a file or files from the user's computer to a remote computer.
Uptime
strangely enough, the opposite of downtime. It is defined as being the time that an item of equipment is in service and operating.
URI
Uniform Resource Identifier - URIs have been known by many names: WWW addresses, Universal Document Identifiers, Universal Resource Identifiers, and finally the combination of Uniform Resource Locators (URL) and Names (URN). As far as HTTP is concerned, Uniform Resource Identifiers are simply formatted strings that identify - via name, location, or any other characteristic - a resource.
URL
Uniform Resource Locator; an address that specifies the location of a file on the Internet (eg, http://www.fsu.edu/library).
Usability
Usability is the measure of how easy it is to use a website. A site would be considered usable if it meets certain criteria, which can include: having logical navigation, adherence to established conventions for the web, and providing an easy to use help section. Many other factors can come into play.
User agent
1) A component of a distributed system that presents an interface and processes requests on behalf of a user; for example, a www browser or a mail user agent.
2) The client which initiates a request. These are often browsers, editors, spiders (web-traversing robots), or other end user tools.
3) A string identifying a browser or agent accessing a web page.
4) Fields in an extended Web server log file identifying the browser and platform used by a visitor.
5) A user agent is a piece of software that interprets Web documents for a user. Examples of user agents are browsers on PCs, cell phones or PDAs, and screen readers.
6) A software application which is used to view a document to which styles have been applied. Typically, this would be a Web browser which visually displays HTML , but CSS can be applied to content for a range of media devices which have media specific style properties. See also CSS2 media stylesheet glossary.
