Computer display standard

Various computer display standards or display modes have been used in the
history of the personal computer. They are often a combination of resolution
(specified as the width and height in pixels), colour depth measured in
bits, and refresh rate expressed in hertz. Until recently, all computer
monitors had a 4:3 aspect ratio. Recently, monitors with 16:9 and 16:10
aspect ratios have become available, leading to new widescreen formats.

Current standards

   * WUXGA - Widescreen Ultra XGA: 1920 x 1200, with a 16:10 aspect ratio
   * UXGA - Ultra XGA. A de facto standard with a resolution of 1600 x 1200
     with 32 bit pixels, true colour.
   * SXGA - Super XGA. A de facto standard with a resolution of 1280 x 1024
     with 32 bit pixels, true colour.

Older standards

   * XGA - Extended Graphics Array is an IBM display standard introduced in
     1990. XGA supports a resolution of 1024 x 768 pixels with a palette of
     256 colours, or 640 x 480 with high colour (16 bits per pixel). XGA-2
     added 1024 x 768 support for high colour and higher refresh rates,
     improved performance, and supports 1360 x 1024 in 16 colours.
   * SVGA - Super Video Graphics Array. A video display standard created by
     VESA for IBM PC compatible personal computers. The resolution is 800 x
     600 4-bit pixels. Each pixel can therefore be one of 16 colours.
   * VGA - Video Graphics Array, with 640 x 480 pixels in 16 colours and a
     4:3 aspect ratio. There is also a text mode with 720 x 400 pixels.
   * 8514
   * EGA - Enhanced Graphics Adapter, with a resolution of 640 x 350 pixels
     of 16 different colours selectable via a palette.
   * CGA - One of IBM's earliest hardware video display standards for use in
     IBM PCs. CGA can display 80 x 25 or 40 x 25 text in 16 colours, 640 x
     200 pixels graphics in 2 colours or 320 x 200 in 4 colors (IBM PC video
     modes 0-6).
   * Hercules, A monochrome display with resolution of 720 by 348 capable of
     text and graphics.
   * MDA, monochrome display adapter, the original standard on IBM XT PCs.
     Supports text only at 720 by 350 pixels.

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