Photoshop
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.
Photoshop Version 6 main screen
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.
As of 2003, Photoshop is at version 8, called CS by Adobe to reflect its integration with their "Creative Suite".
The term photoshopping is a neologism, meaning 'editing an image,' regardless of the program used. Adobe discourages use of the term out of fear that it will undermine the company's trademark. It is sometimes used with a derogatary intent by artists to refer to images that have been retouched instead of originally produced. A common issue amongst users of all skill levels is the ability to avoid in one's work what is referred to as "the Photoshop look" (although such an issue is intrinsic to many graphics programs).