QuickTime is the industry standard multimedia architecture used by software tool vendors and content creators to store, edit and play synchronized graphics, sound, video, text and music. QuickTime is the most pervasive container and playback engine for multimedia content delivered on CD-ROM and the Internet.
In other words, QuickTime is the technology that makes multimedia a reality on Macintosh, Windows and other platforms. Thanks to QuickTime, capturing, creating, editing, and delivering engaging multimedia is incredibly easy.