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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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RJ-11

RJ-11 is the type of connection used by standard phone lines. Home telephones, fax machines, and computer modems all connect through RJ-11 jacks.