Adobe Photoshop Lightroom is a photo editing and management computer program developed by Adobe Systems for Windows and OS X, designed to assist users in managing large quantities of digital images and doing post production work. Lightroom combines photo management and editing in one interface. Lightroom and Photoshop share many of the same photo editing capabilities but with very different strengths, namely Lightroom's non-destructive behavior and Photoshop's ability to layer and manipulate specific elements of an image.
Lightroom is not a file browser like Adobe Bridge, but rather an image management application database which helps in viewing, editing, and managing digital photos. Its closest competitor is Apple's Aperture program which similarly provides photo management and non-destructive editing capabilities.