Microsoft® Computer Dictionary

Chapter 22. U

u- prefix

A letter sometimes substituted for the Greek letter μ (mu), meaning micro, used as a prefix in measurements denoting one millionth, or 10^-6. See also micro- prefix.

UA n.

See user agent n..

UART n.

Acronym for universal asynchronous receiver-transmitter. A module, usually composed of a single integrated circuit, that contains both the receiving and transmitting circuits required for asynchronous serial communication. A UART is the most common type of circuit used in personal computer modems. Compare USRT.

ubiquitous computing n.

A term coined by Mark Wieser (1988) at the Xerox PARC Computer Science Lab to describe a computing environment so pervasive in daily life that it’s invisible to the user. Household appliances such as VCRs ...