Definition:
MP3 - The most common kind of digital music file. MP3s usually have no usage restrictions and can be used on as many computers or iPods as you want. Short for MPEG Layer-3, a digital media standard developed by the Motion Picture Experts Group (MPEG).
iPod compatible: Yes
More at Wikipedia.Examples:
You get MP3s from:
- eMusic
- "ripping" songs from CD
- Many file-sharing services
