USB
Universal Serial Bus capable of connecting a very large number of external devices on a computer eg printers, scanners, digital cameras , mice, keyboards, modems, joysticks, hard drives etc. Multiple USB’s can be added by using a USB hub which will add more ports (usually 4).
URL
Uniform Resource Locator. Describes the location and access method of a resource on the Internet. This is also known as the “Web site address.” The URL contains four distinct parts, the protocol type, the machine name, the directory path and the file name.
UPLOAD
To transfer data or files from a local or subordinate system to a larger or more central one. Eg from a personal computer to an Internet server.
VODCAST
Video podcast (sometimes shortened to vidcast or vodcast) is a term used for the online delivery of video on demand clip content via Atom or RSS enclosures. The term is an evolution specialised for video, coming from the generally audio-based podcast and referring to the distribution of video where the RSS feed is used as a non-linear TV channel to which consumers can subscribe using a PC, TV, set-top box, media center or mobile multimedia device.
VECTOR GRAPHICS
Vector graphics describe images using lines and curves, called vectors, that also include colour and position properties. Each vector uses mathematical calculations, instead of bits, to describe the shape, which allows them to be scaled without degrading in quality.
VIDEO CARD
Video card (alternate terms include graphics card, display adapter, video card, video board and almost any combination of the words in these terms) is an integrated circuit card in a computer or in some cases, a monitor that provides digital-to-analog conversion, video RAM, and a video controller so that data can be sent to a computer’s display. Today, almost all displays and video cards adhere to a common denominator de facto standard, Video Graphics Array (VGA). VGA describes how data - essentially red, green, blue data streams - is passed between the computer and the display. It also describes the frame refresh rates in hertz. It also specifies the number and width of horizontal lines, which essentially amounts to specifying the resolution of the pixels that are created. VGA supports four different resolution settings and two related image refresh rates.
VIRTUAL MEMORY
Logically-assigned memory that may or may not exist physically. Through the use of paging and the swap area, more memory can be referenced and allocated than actually exists on the system.