VGA Abbreviation of video graphics array, a graphics display system for PCs developed by IBM in 1987. VGA has become one of the de facto standards for PCs. 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. XGA   Short for extended graphics array, a high-resolution graphics standard introduced by IBM in 1990. XGA was designed to replace the older 8514/A video standard. It provides the same resolutions (640 by 480 or 1024 by 768 pixels), but supports more simultaneous colors (65 thousand compared to 8514/A's 256 colors). In addition, XGA allows monitors to be non-interlaced.   SXGA Short for Super Extended Graphics Array, a display specification that is capable of displaying 1280 x 1024 resolution, or approximately 1.3 million pixels. UXGA Short for Ultra Extended Graphics Array, a display specification that is capable of displaying 1600 x 1200 resolution, or approximately 1.9 million pixels. QXGA   Short for Quantum Extended Graphics Array, a display specification that is capable of supporting 2048 x 1536 resolution, or approximately 3.2 million pixels.