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 Desktop Education Icons

Scientist Icon Images

Scientist Icon

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

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What Are PNG Icons?

A number of independent vendors are supplying custom icons in sizes and resolutions common to certain computer platforms. The article explains what icons are, how they are designed and implemented in various platforms, and what standards exist for Windows icons, Mac icons, and PNG icons.

Computer icons are incorporated into any modern GUI. Icons are small pictograms of standardized resolutions that visually represent objects, actions, and other concepts. In graphical user interfaces, icons are used as a quicker, more intuitive way to communicate with the user. Icons depicting common elements of a user interface are better visible than text, can be recognized faster, and are easier for new computer users.

Originally developed in 1970 by the Xerox Research Center and widely deployed by the Mac OS and Microsoft Windows systems, icons make new users feel more comfortable with operating systems, learn faster and work more efficiently. Icons can be employed to replace or supplement text messages. Commonly used in menus, toolbars, on buttons and in the latest ribbon-style user interfaces, icons have come a long way from the original concept.

There are multiple file formats for storing icons. The Windows systems store Windows icons in the platform-dependent ICO format. Apple Macintosh 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 Apple platforms, while Unix users can create PNG icons with just about any graphic editor.

As a rule of thumb, icons are square images that come in a number of standard sizes and color resolutions. Most platforms support icons of 16x16 to 128x128 pixels, while some systems readily accept icon images as large as 512x512 pixels. The big 512x512 pixel icons were first used in Mac OS Leopard.

Pixel resolutions of all icons are operating system dependent. For example, Windows icons are specified as pictures 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 sizes 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 images. Other platforms such as Windows Mobile can use standard icons of other resolutions, such as 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 platforms. The company provides royalty-free icons individually and in matching sets incorporating icons drawn a common style or theme.



Designed Pictogram Libraries

Individual Ready Icons

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

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Download Desktop Education Icons
Program Toolbar Icons Add professionally designed toolbar icons to your software projects. Program Toolbar Icons are instantly available, royalty-free graphics of items, actions and symbols that are commonly used in software toolbars.

Perfect Science Icons Scientific application and Web-site developers will certainly appreciate this hard-to-find pack of scientific images. Presenting various symbols and objects common for all the fields of science and engineering, Perfect Science Icons are a wonderfull value.

24x24 Free Pixel Icons 24x24 Free Pixel Icons library contains all the images you need for your web site or software toolbar.

Military Icon Set Plenty of military-style icons from our Military Icon Set will make your application's interface look more modern and attractive. The images are provided in PNG, ICO, BMP and GIF file formats.

Classic Hardware Icon Set Hardware Icon Set is a collection of hardware related icons, available in ICO, BMP, PNG and GIF formats and 16x16, 24x24 and 32x32 sizes. The library contains both 32-bit and 256-color icons.