r type of digital file.
             Many applications in the MS-DOS environment that employ multiple media in this way usually use them as discrete elements or as complements to each other just as magnetic disks do. Philips and Dupont Optical Company (PDO) refer to this as "mixed mode". It defines a mixed mode CD-ROM as one, which contains computer readable data on track 1 and CD-quality audio on the remaining tracks, 2 through 99 (Multimedia in Practice 1995, p. 23).
             Others understand "multimedia" to mea
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