A compact disc, or CD, is an optical disc that is used to record digital data. A CD can hold up to 80 minutes of uncompressed audio (700MB of data). A DVD, or digital video disc, is similar to a CD, but can store around seven times as much data. The DVD has superseded the CD in terms of use, but you can learn how to convert your CDs into DVDs and still enjoy watching your favorite movies. Writer Bio
