• Information Technology (448)
• Universal (24)

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U

Unicasting

Communication between a sender and a single receiver over a network. For example, an email message sent from one person to another.

Source: Learning Circuits

Unix

A computer operating system developed by AT&T Bell Labs and used to develop the Internet. It is no longer the sole operating system used to run servers.

Uplink

The communication link from a transmitting earth station to a satellite.

Source: Learning Circuits

Upload

Transferring a file or files from the user's computer to a remote computer.

URI (uniform resource identifier)

Name and address of information--text, graphics, audio, video, and so forth--on the Internet. A URI usually identifies the application used to access the resource, the machine the resource is located on, and the file name of the resource. A Webpage address or URL is the most commonly used type of URI.

Source: Learning Circuits

URL

Short for Uniform Resource Locator. A string of characters used to uniquely identify a page of information on the WWW. This information is used by browser software to find other WWW, FTP, telnet, gopher, etc. sites on the Internet.

Usability

The measure of how effectively, efficiently, and easily a person can navigate an interface, find information on it, and achieve his or her goals.

Source: Learning Circuits