U
- UDF (Universal Disk Format)
-
Standard CD-ROM and DVD file system designed to
ensure consistency in optical media.
- UDP (User Datagram Protocol)
-
A communications method that uses the Internet
Protocol (IP) to send a data unit (called a datagram) from one
computer to another in a network. Network applications that have
very small data units to exchange might use UDP rather than
TCP.
- UFS (UNIX File System)
-
This volume format is used primarily by UNIX and
UNIX-based operating systems.
- UID (User identification number)
-
The number used in multiuser operating systems
to uniquely identify a user.
- UNIX
-
Pronounced YEW-nihks. Nonproprietary operating
system used on computers.
- URL (Uniform Resource Locator)
-
An address of a file or resource accessible on a
network server, such as a website on the Internet or a shared
volume on a local file server. The URL prefix determines the
protocol used: HTTP, AFP, SMB, and so on.
- USB (Universal Serial Bus)
-
A serial interface between a computer and add-on
devices.
- Universal Access
-
Mac OS X accessibility software for improving
human interface usability and functionality.
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