Developed by Apple Computer, QuickTime is a method of storing sound, graphics, and movie files. It is one of three major video technologies for computing. (The others are Video for Windows and MPEG.) If you see a filename that ends with the extension .mov on the Web or on a CD-ROM, you'll know it's a QuickTime file. Although QuickTime was originally developed for Apple's Macintosh computer, software for it is now available for Microsoft Windows and other platforms. If you don't have a QuickTime player, you can always download it from Apple's web site.