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Icon sizes: 256x256, 48x48, 32x32, 24x24, 16x16, 512x512
File formats: ICO, GIF, PNG, BMP

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What Are PNG Icons?

A number of independent vendors are offering custom icons in sizes and resolutions standard to certain computer platforms. The article explains what icons are, how they are used and implemented in various platforms, and what standards are defined for Windows icons, Mac icons, and PNG icons.

Computer icons are an integral part of any modern GUI. Icons are small pictograms of standard sizes that visually represent objects, actions, and other concepts. In window-based systems, icons are used as a faster, more intuitive way to communicate with the user. Icons representing common 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 popularized by the Mac OS and Microsoft Windows platforms, icons make computer novices feel more comfortable with operating systems, learn faster and work more efficiently. Icons can be employed to replace or supplement text commands. Widely used in menus, toolbars, on buttons and in new ribbon-style user interfaces, icons have come a long way from the original concept.

There are multiple file formats for storing icons. Microsoft Windows systems store Windows icons in the platform-dependent ICO format. Mac OS computers use Mac icons in their specific formats, while Unix-based systems employ PNG icons for most applications. As such, icon software is generally available for the Windows and Apple systems, while Unix users can design PNG icons with just about any image editor.

As a rule of thumb, icons are square images 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 high-resolution 512x512 pixel icons were first used in Mac OS Leopard.

Pixel dimensions of all icons are operating system 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 are supplied in standard sizes of 16x16, 32x32, and 48x48 pixels. Windows Vista implements new standards for Windows icons, including icons in resolutions of up to 256x256 pixels in True Color only. Optionally, icons of 128x128 and 512x512 pixels are supported. Interestingly, the higher resolution versions of Windows Vista icons are stored in compressed PNG format instead of Windows ICO used in older versions of Windows and for lower resolution images. 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 common to those systems. The company provides royalty-free icons individually and in matching sets that include icons drawn a common style or theme.

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You can buy individual icons to suit your needs. Each icon is $1 when purchased individually.

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Download Large Business Icons
Large Weather Icons Large Weather Icons represent different weather conditions that are common for software, weather portals, and mobile gadgets. The icons are available in all sizes standard to Windows, Mac OS, and mobile platforms. The biggest versions are huge 512x512 pixel images with vector sources in Adobe Illustrator (.ai) format easily affordable and ready to be printed or used in presentations in highest resolution.

Standard Chess Icons develop chess games and Web sites easier with Standard Chess Icons! All white and black figures are available as 2D and 3D icons, the graphics for chess board and timer are also there.

Large Money Icons Large Money Icons is a collection of carefully drawn icons for use in commercial and personal projects, such as software applications, websites, blogs and presentations. The icons have a bright color palette, smooth and well-rounded edges.

Large Toolbar Icons If you are searching for a modern and stylish design for you program's toolbar, try using graphics in large sizes. Large Toolbar Icons pack by Aha-Soft is exactly what you need.

Database Icon Set Database Icon Set brings you a variety of bright and colorful icons for database application development. The images are provided in all the typical icon sizes and file formats include PNG, GIF, BMP and ICO.