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What Are Windows Icons?
Computer icons are an integral part of any graphical user interface. Icons are small pictograms of standardized sizes that visually represent objects, actions, and symbols. In graphical user interfaces, icons are used as a faster, more intuitive way to communicate with the user. Icons depicting standard elements of a user interface are more visually appealing than text, can be recognized faster, and are easier for new computer users.
Originally introduced in 1970 by the Xerox Research Center and widely deployed by the Mac OS and Microsoft Windows platforms, icons make new users feel more comfortable with operating systems, learn quicker and interact more efficiently. Icons can be employed to replace or supplement text commands. Commonly used in menus, toolbars, on buttons and in new ribbon-type user interfaces, icons have come a long way from the original concept.
There are multiple graphic formats for storing icons. The Windows systems use Windows icons in the platform-dependent ICO format. Mac OS computers use Mac icons in their specific formats, while Unix-based systems use PNG icons for most applications. As such, icon software is generally available for the Windows and Mac OS platforms, while Unix users can create PNG icons with just about any image editor.
Generally speaking, icons are square pictograms that come in a variety of standard sizes and color resolutions. Most systems support icons of 16x16 to 128x128 pixels, while some systems readily accept icon images as large as 512x512 pixels. The large 512x512 pixel icons were first employed in Mac OS Leopard.
Pixel dimensions of all icons are platform dependent. For example, Windows icons are specified as images in 16 and 256-color gammas as well as True Color pictures with alpha channel. Windows icons come in standard resolutions of 16x16, 32x32, and 48x48 pixels. Windows Vista defines new standards for Windows icons, including icons in resolutions of up to 256x256 pixels in True Color only. Optionally, images of 128x128 and 512x512 pixels are supported. Interestingly, the high-resolution Windows Vista icons are stored in compressed PNG format instead of Windows ICO used in previous versions of Windows and for lower resolution icons. Other platforms such as Windows Mobile can employ standard icons of other resolutions, e.g. 24x24 pixels.
Numerous independent designers are providing custom icons. Aha-Soft offers a variety of Windows icons, Mac icons, and PNG icons in all sizes and resolutions standard to those platforms. The company provides royalty-free icons individually and in matching sets incorporating icons drawn a common style or theme.
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