Video Graphics Array or VGA format is the the lowest common denominator that all PC graphics hardware supports, before a device-specific driver is loaded into the computer. Essentially, this means that all PCs today support VGA video cable
signals, which means that transmitting video in this format is universal. It's likely that your office, school, or training center uses this type of technology to transmit visual data from computer to monitor and as such, it's important for you to understand just how the technology works. What is VGA?
VGA stands for Video Graphics Array and it is a graphics display system for PC computers developed by IBM and released in 1987. Since its invention, VGA video cables and VGA technology have become the standard for PCs and all PCs made today support this format, as well as in some cases, another more advanced standard.
Unlike the earlier graphic standards for PCs (eg: MDA, CGA, and EGA), VGA video cables
use analog video signals rather than digital signals to transmit visual data. This allows for easy compatibility, however, in some cases, a monitor designed for one of the older standards will not be able to use VGA. Either way, more often than not, VGA is nearly always readily available to use with your PC. What are the Specifics of VGA video cable?
In text mode, VGA systems provide a resolution of 720 by 400 pixels. In graphics mode, the resolution is either 640 by 480 (with 16 colors) or 320 by 200 (with 256 colors). The total palette of colors is 262,144. Are There Other Standards Besides VGA?
Since the VGA video cable
and the technology accompanying it debuted, several other standards have been developed that offer greater resolution and more colors, like SVGA and XGA. While these new standards are used in some more advanced machines, VGA video and VGA video cable are most likely to be used just about anywhere.