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 features available. 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.

CS3

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.)

System requirements

Windows

• 1.8GHz or faster processor
• Microsoft® Windows® XP with Service Pack 2 (Service Pack 3 recommended) or Windows Vista® Home Premium, Business, Ultimate, or Enterprise with Service Pack 1 (certified for 32-bit Windows XP and 32-bit and 64-bit Windows Vista)
• 512MB of RAM (1GB recommended)
• 1GB of available hard-disk space for installation; additional free space required during installation (cannot install on flash-based storage devices)
• 1,024x768 display (1,280x800 recommended) with 16-bit video card
• Some GPU-accelerated features require graphics support for Shader Model 3.0 and OpenGL 2.0
• DVD-ROM drive
• QuickTime 7.2 software required for multimedia features
• Broadband Internet connection required for online services

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.A version of Adobe Photoshop CS5 Extended was used for a Prerelease Beta (known as "White Rabbit"). A large group of selected Photoshop users were invited to beta test in mid-February 2010.Below you’ll find our short roundup of the main features that we thing are worth being noted in the Photoshop CS5. We should mention that our criteria was to highlight primarily the design-related features that will be useful for professional web designers but we hope that our roundup will be useful for all Photoshop users.

System requirements

Windows

• Intel® Pentium® 4 or AMD Athlon® 64 processor
• Microsoft® Windows® XP with Service Pack 3; Windows Vista® Home Premium, Business, Ultimate, or Enterprise with Service Pack 1 (Service Pack 2 recommended); or Windows 7
• 1GB of RAM
• 1GB of available hard-disk space for installation; additional free space required during installation (cannot install on removable flash-based storage devices)
• 1024x768 display (1280x800 recommended) with qualified hardware-accelerated OpenGL graphics card, 16-bit color, and 256MB of VRAM
• Some GPU-accelerated features require graphics support for Shader Model 3.0 and OpenGL 2.0
• DVD-ROM drive
• QuickTime 7.6.2 software required for multimedia features
• Broadband Internet connection required for online services