MP3

Definition: MP3 stands for Moving Picture Experts Group (MPEG)-1 Audio Layer 3. An MP3 is a type of digital audio that is typically used for storing music on the computer. MP3 files are popular because a full length song requires about 1/10 of the space of a normal song, yet the quality of the music relatively the same.

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progressive scan

Progessive scan is a method for "painting" a video signal by displaying video lines sequentially (progressively) from top to bottom. This is in contrast to the alternating odd/even method used with an interlaced signal. Progressive scan signals are considered superior to interlaces signals due to their scalability for high definition displays and the absence of quirks sometimes associated with interlaced signals.