V

V – Volts.

Validation – A mechanism to ensure that user-entered data lies within specified limits.

VBR (variable bit rate) – A method of compressing data that takes advantage of changes in the media’s data rate.

VDC – Volts direct current.

VGA and SVGA – Abbreviation of video graphics array, a graphics display system developed by IBM. VGA has become one of the de facto standards for personal computers. SVGA stands for Super VGA, a set of graphics standards designed to offer greater resolution than VGA.

Video Mirroring – The act or feature of connecting two displays to the computer and using both displays at the same time, showing the same image both displays.

Video RAM-Video random-access memory. Supplies display memory additional to that provided in main memory. With more VRAM, more colors and higher screen resolutions are available.

Virtual Memory – Virtual memory is hard disk space that the computer uses as if it were RAM. Disk space used for virtual memory is not available for storing files. Data stored in virtual memory is lost on shut down as with physical RAM.

Virtual User – An alternate email address short name for a user.

Voice Input Device – A device that translates the spoken word into a form that some software can process.

Volume Name – The name of a disk or its main directory. Pathname is the complete name of a document beginning with the name of the disk, also called the volume name, the name of the subdirectory it’s in if it’s in one, and the name of the document. The pathname begins with a slash, and the parts of the pathname are separated with slashes. It’s called a pathname because it describes the route to the document.

VPN Virtual Private Network-A network that uses encryption and other technologies to provide secure communications over a public network, typically the Internet. VPNs are generally cheaper than real private networks using private lines but rely on having the same encryption system at both ends. The encryption may be performed by firewall software or by routers.