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Photoshop is a bitmap graphics editor, published by Adobe. It is the market leader for commercial bitmap image manipulation. As with most of other Adobe's applications, Photoshop is available for Mac OS and Microsoft Windows. It has also been released for Unix.

The development of Photoshop started in 1987 by the brothers Thomas and John Knoll, although it was not until 1990 that the program was first released by Adobe. Remarkably, the program was intended from the start as a tool for manipulating images that were digitized by a scanner, which was a rare and expensive device in those days.

Although primarily designed to edit images for paper-based printing, Photoshop is used increasingly to produce images for the World Wide Web. Recent versions have been shipped with a separate application, ImageReady[?], which provides a more specialised set of tools for this purpose.

Photoshop is currently at version 7.

The term photoshopping is a neologism, meaning 'editing an image,' regardless of the program used.

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