Short for Video Graphics Array, VGA is a popular display standard developed by IBM and introduced in 1987, VGA provides 640 x 480 resolution color display screens with a refresh rate of 60Hz and 16 colors displayed at a time. If the resolution is lowered to 320 x 200, 256 colors can be displayed. VGA capability is built into plug-in video cards, VGA chips, and monitors that can work with the VGA cards. Today, VGA has been replaced by SVGA.
Below is an illustration of the 15-Pin VGA connector, its pin assignments, and size dimensions with a chart describing what each of the pins are for.
| PIN | FUNCTION |
| 1 | Red Video |
| 2 | Green Video |
| 3 | Blue Video |
| 4 | Monitor ID 2 |
| 5 | TTL Ground (monitor self-test) |
| 6 | Red Analog Ground |
| 7 | Green Analog Ground |
| 8 | Blue Analog Ground |
| 9 | Key (Plugged Hole) |
| 10 | Sync Ground |
| 11 | Monitor ID 0 |
| 12 | Monitor ID 1 |
| 13 | Horizontal Sync |
| 14 | Vertical Sync |
| 15 | Monitor ID 3 |
