User Datagram Protocol. A "connection-less" protocol that is similar to TCP in that it relies on IP addresses, except that the sender of messages in not aware of listeners. See also TCP.
unbundle node
Function that separates (unbundles) a cluster into one or more individual elements. See also Unbundle Node.
unit
A unit of measurement. A physical dimension. For example, meter, foot, year, deg C, Joule, millisecond.
universal constant
Uneditable block diagram object that emits a particular ASCII character or standard numeric constant; for example, pi.
URL
Uniform Resource Locator. A logical address that identifies a resource on a server, usually on the Web. For example, http://www.labviewforeveryone.com/ is the URL for the web site of this book.
USB
Universal Serial Bus. A very common serial bus for connecting devices, usually computer peripherals.
