Way back when Photoshop Version 7 was released, Adobe added a feature called the File Browser, which enabled users to quickly find the files they needed by using a visual interface. Over the past few releases, this tool was greatly enhanced and eventually turned into its own application, called Bridge.
Bridge acts as the hub for your digital media assets. It can track the locations of the files that you’re using and creating in the CS3 suite, as well as files created outside of CS3 that are supplemental to your projects. Think of Bridge as the ultimate media file browser for your system that just happens to also include
An integrated browser for accessing online resources
A photo downloader for your camera
An advanced ...