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PC Glossary

Definitions of Computer and Internet Terms

Computer Terms Beginning with "U"

U U is the standard unit of measurement for rack-mounted equipment. Racks can be used to house servers, hard drives...
UDDI Stands for "Universal Description Discovery and Integration." UDDI is a protocol that allows businesses to promote...
UDP Stands for "User Datagram Protocol." It is part of the TCP/IP suite of protocols used for data transferring. UDP is a...
Ultra DMA This technology for transferring data between a computer's hard disk and memory was developed by Quantum and Intel...
UML Stands for "Unified Modeling Language." This is a programming language that is used for object-oriented software...
UNC Stands for "Universal Naming Convention," not just the home of the North Carolina Tar Heels. UNC is a filename format...
Undo The Undo command is located in the Edit menu of most programs and has the shortcut "Ctrl+Z" (PC) or "Cmd-Z" (Mac). It...
Unfriend When you unfriend a user, your remove that person from your list of friends on a social networking website, such as...
Unix Also known as UNIX, though the letters do not stand for anything. The Unix operating system was first created in Bell...
Unmount Unmounting a disk makes it inaccessible by the computer. Of course, in order for a disk to be unmounted, it must first...
Upload While downloading is receiving a file from another computer, uploading is the exact opposite. It is sending a file...
UPnP Stands for "Universal Plug and Play." Plug and Play describes devices that work with a computer system as soon as they...
UPS Stands for "Uninterruptible Power Supply." In the technology world, UPS is more than just a brown shipping company...
URI Stands for "Uniform Resource Identifier." A URI identifies the name and location of a file or resource in a uniform...
URL Stands for "Uniform Resource Locator." A URL is the address of a specific Web site or file on the Internet. It cannot...
USB Stands for "Universal Serial Bus." USB is the most common type of computer port used in today's computers. It can be...
User Interface A user interface is the means in which a user controls a software program or hardware device. For example, a software...
Username A username is a name that uniquely identifies someone on a computer system. For example, a computer may be setup with...
Utility Utility programs, commonly referred to as just "utilities," are software programs that add functionality to your...

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