Adobe Photoshop, or simply Photoshop, is a graphics editing program developed and published by Adobe Systems. It has been described as “an industry standard for graphics professionals” and was one of the early “killer applications” on Macintosh. Photoshop CS4, the current eleventh iteration of the program, was officially announced on 23 September 2008 and released on 15 October 2008. Photoshop has strong ties with other Adobe software for media editing, animation, and authoring.
The .PSD (Photoshop Document) format stores an image with support for most imaging options available in Photoshop. These include layers with masks, color spaces, ICC profiles, transparency, text, alpha channels and spot colors, Clipping paths, and duotone settings.
