QuickTime - QuickTime is an Apple technology that allows video, digitized sound, music, 3D, and virtual reality to be viewed by a visitor to a Web site. It's built into Macintosh but if your computer uses Windows you can download QuickTime. QuickTime supports most encoding formats, including Cinepak, JPEG, and MPEG.  QuickTime is competing with a number of other standards, including AVI and ActiveMovie.