Adobe Photoshop is a graphics editor developed and published by Adobe Systems. It is the current market leader for commercial bitmap and image manipulation, and, in addition to Adobe Acrobat, is one of the most well-known pieces of software produced by Adobe Systems. It is considered the industry standard in most, if not all, jobs related to the use of visual elements. It is usually referred to simply as "Photoshop". Photoshop is currently available for Mac OS and Microsoft Windows; versions up to Photoshop 9.0 can also be used with other operating systems such as Linux using software such as CrossOver Office. Past versions of the program were ported to the SGI IRIX platform, but official support for this port was dropped after version 3.

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Although primarily designed to edit images for paper-based printing, Photoshop is used increasingly to produce images for the World Wide Web. Recent versions bundle a related application, Adobe ImageReady, to provide a more specialized set of tools for this purpose.

Photoshop also has strong ties with other Adobe software for media editing, animation and authoring. Files in Photoshop's native format, .PSD, can be exported to and from Adobe ImageReady, Adobe Illustrator, Adobe Premiere, After Effects and Adobe Encore DVD to make professional standard DVDs, provide non-linear editing and special effects services such as backgrounds, textures and so on for television, film and the Web. For example, Photoshop CS broadly supports making menus and buttons for DVDs. For .PSD files exported as a menu or button, it only needs to have layers, nested in layer sets with a cueing format and Adobe Encore DVD reads them as buttons or menus.

Photoshop can deal with a number of different color models:

• RGB color model
• Lab color model
• CMYK color model
• Grayscale
• Bitmap
• Duotone

The most recent version, released in 2006, is version 9. This iteration of the program is marketed as "Photoshop CS2". "CS" reflects its integration with "Adobe's Creative Suite" and a number "2" because it is the second version released since Adobe rebranded their products under the CS umbrella. Photoshop CS2 features important new additions such as multiple layer selecting and "warp", a curve-friendly version of the transform tool. For the digital photography enthusiasts, the "reduce grain" filter can help to improve pictures taken in low light. In an effort to break away from previous versions of the application and to reinforce its belonging with the new line of products, Photoshop even dropped one classic graphic feature from its packaging: the Photoshop eye, which was present in different manifestations from versions 3 to 7. Photoshop CS versions now use feathers as a form of identification. The latest version comes with Adobe Camera RAW, a plugin developed by Thomas Knoll which can read several RAW file formats from various digital cameras and import them directly into Photoshop. A preliminary version of the RAW plugin was also available for Photoshop 7.0.1 as a $99 USD optional purchase.

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