Computer displays
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Computer displays with aspect ratios wider than 4:3 are also called widescreen. Widescreen computer displays are mainly intended for computers used, at least sometimes, to display entertainment; data processing tends to use 4:3. Widescreen computer displays are typically of the 1.6 (8:5, typically written as 16:10) aspect ratio. "True" widescreen (16:9) monitors can be found in resolutions of 1024x576, 1152x648, 1280x720, 1600x900, and 1920x1080. Apple's 27" iMac introduced a new 16:9 resolution: 2560x1440 in late 2009.
By 2010, many manufacturers had practically abandoned the older 4:3 format[citation needed], instead opting to manufacture 16:10 models, and lately, even shorter 16:9 displays.
Suitability for applications
* Since many modern DVDs and some TV shows are in a widescreen format, widescreen displays are optimal for their playback on a computer. 16:9 material on a 16:10 display will be letterboxed, but only slightly. However, when screen width is not an issue, as in data processing or viewing 4:3 entertainment material such as older films and digital photographs, the sides of the widescreen image may be wasted, although it can be useful to display two or more windows side-by-side[3].
However, for data processing (including word processing) many computer programs often have many toolbars and other information such as status bars, headers, and tabs, which require vertical space. In such cases the additional width is unwanted; on a computer used only for data-processing the additional screen area is better dedicated to a larger 4:3 screen.
* When displaying a document or ebook, two pages can be displayed side by side on a wide screen, or two documents compared. If a desktop monitor supports it, a whole single page of a book or document can be displayed on a rotated "portrait"-oriented screen, with two snags: printed pages are most commonly displayed in 16:11 aspect ratio on readers such as Kindle-DX, the aspect ratio, in fact closer to 4:3 than to 16:9, and second TN panels have notoriously poor vertical viewing angles.
* A very few computer games, including the first few Command & Conquer games, run at a native 640x400 resolution, making them exceptionally well-suited to 8:5 monitors. A slightly larger number, including Doom 3, can be set to either widescreen or fullscreen (4:3), with the widescreen options offering wider horizontal fields of view without sacrificing vertical FOV. However, most computer games are not designed for optimum effect on a widescreen display, being stretched unnaturally, not filling the screen, or letterboxed.
* Older laptop computers with a pointing device that did not take up space such as a pointing stick (Trackpoint) or trackball attached to the side of the machine could accommodate a keyboard which matched a 16:9 screen well. The use of touchpads, which require a lot of space below the keyboard, and the removal of keys such as the Numeric keypad more accurately matches the 4:3 ratio of a screen found on smaller netbooks and laptops.
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