The Magical Graphics Tool From Adobe

Adobe Photoshop is a graphics editing program developed and published by Adobe Systems Incorporated.
Adobe's 2003 "Creative Suite" rebranding led to Adobe Photoshop 8's renaming to Adobe Photoshop CS. Thus, Adobe Photoshop CS5 is the 12th major release of Adobe Photoshop. The CS rebranding also resulted in Adobe offering numerous software packages containing multiple Adobe programs for a reduced price. Adobe Photoshop is released in two editions: Adobe Photoshop, and Adobe Photoshop Extended, with the Extended having extra 3D image creation, motion graphics editing, and advanced image analysis features. Adobe Photoshop Extended is included in all of Adobe's Creative Suite offerings except Design Standard, which includes the Adobe Photoshop edition.
Alongside Adobe Photoshop and Adobe Photoshop Extended, Adobe also publishes Adobe Photoshop Elements and Adobe Photoshop Lightroom, collectively called "The Adobe Photoshop Family" by Adobe. In 2008, Adobe released Adobe Photoshop Express, a free web-based image editing tool to edit photos directly on blogs and social networking sites.
Adobe support only Windows and Mac versions of this program but with Wine, CS4 version of Photoshop can work on Linux Photoshop has ties with other Adobe software for media editing, animation, and authoring.
The .PSD (Photoshop Document), Photoshop's native 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. This is in contrast to many other file formats (e.g. .EPS or .GIF) that restrict content to provide streamlined, predictable functionality. PSD format is limited to a maximum height and width of 30,000 pixels. .PSB (Photoshop Big) format, also known as "large document format" within Photoshop, is the extension of PSD format to images up to 300,000 pixels in width or height. That limit was apparently chosen somewhat arbitrarily by Adobe, not based on computer arithmetic
constraints (it is not close to a significant power of two, as is 30,000) but for ease of software testing. PSD and PSB formats are documented. Photoshop's popularity means that the .PSD format is widely used, and it is supported to some extent by most competing software. The .PSD file format can be exported to and from Adobe Illustrator, Adobe Premiere Pro, and After Effects, to make professional standard DVDs and provide non-linear editing and special effects services, such as backgrounds, textures, and so on, for television, film, and the Web. Photoshop's primary strength is as a pixel-based image editor, unlike programs such as Macromedia FreeHand (now defunct), Adobe Illustrator, Inkscape or CorelDraw, which are vector-based image editors. However, Photoshop also enables the creation, incorporation, and manipulation of vector graphics through its Paths, Pen tools, Shape tools, Shape Layers, Type tools, Import command, and Smart object functions. Utilization of these tools and commands provides convenience when it is desirable to combine pixel-based and vector-based images in one Photoshop document because it can eliminate the necessity to visit more than one software program and transfer files between them. However, for the initial creation of very complex vector graphics that contain numerous shapes and numerous colors, it is much easier to use a software that was created primarily for that purpose, such as Adobe Illustrator or CorelDraw. If it is then necessary to import the complex vector object into Photoshop, it is possible to import it into Photoshop as a Smart Object. When the Smart Object is double-clicked on Photoshop's layers palette, it is opened in its original software such as Adobe Illustrator where changes can be made, then after saving it, the Smart Object will be automatically updated in Photoshop.

CS3

Smart Objects display filters without altering the original image (here on Mac OS X) New productivity features include a streamlined interface, improved Camera RAW support, better control over print options, enhanced PDF support, and better management with Adobe Bridge. Editing tools new to CS3 are the Clone Source palette and nondestructive Smart Filters, and other features such as the brightness and contrast adjustment and Vanishing Point module were enhanced. The Black and White adjustment option improves control over manual grayscale conversions with a dialog box similar to that of Channel Mixer. Compositing is assisted with Photoshop's new Quick Selection and Refine Edge tools and improved image stitching technology.
CS3 Extended contains all features of CS3 plus tools for editing and importing some 3D graphics file formats, enhancing video, and comprehensive image analysis tools, utilizing MATLAB integration and DICOM file support.

CS4

Photoshop CS4 features a new 3D engine allowing painting directly on 3D models, wrapping 2D images around 3D shapes, converting gradient maps to 3D objects, adding depth to layers and text, getting print-quality output with the new ray-tracing rendering engine. It supports common 3D formats; the new Adjustment and Mask Panels; Content-aware scaling (seam carving); Fluid Canvas Rotation and File display options. On 30 April, Adobe released Photoshop CS4 Extended, which includes all the same features of Adobe Photoshop CS4 with the addition of capabilities for scientific imaging, 3D, and high-end film and video users. The successor to Photoshop CS3, Photoshop CS4 is the first 64-bit Photoshop on consumer computers (only on Windows – the OS X version is still 32-bit only.)

CS5

Photoshop CS5 was launched on April 12, 2010. In a video posted on its official Facebook page, the development team revealed the new technologies under development, including three dimensional brushes and warping tools. In May 2011, Adobe Creative Suites 5.5 (CS5.5) were released which have new versions of some of the applications. However, the Photoshop that comes with them which is labeled version 12.1 is identical to the concurrently released update for Photoshop CS5, version 12.0.4, except for support for the new subscription pricing that was introduced with CS5.5