User Datagram Protocol - A communications protocol used by computers in a network that uses IP. It is an alternate protocol to TCP.

Uniform Resource Locator (URL) – The address of a file or web page on the Internet. Example: www.lizardsolutions.com is a URL.

Universal Serial Bus (USB) – A plug-and-play interface between a computer and add-on devices (such as audio players, joysticks, keyboards, telephones, scanners, and printers). With USB,
a new device can be added to your computer without having to add an adapter card or even having to turn the computer off.

Upgrade – A new version of, or addition to, a hardware or software product that is already installed or in use on the system.

URL – see Uniform Resource Locator

USB – see Universal Serial Bus