Fairplay is Apple's digital rights management (DRM) scheme to protect their iTunes Music Store downloads from piracy and unauthorized sharing.

Most songs and videos purchased through the iTunes Music Store are encoded with your purchasing account ID. iTunes content is currently restricted in the following manner:

• You can play your music on up to 5 different computers (you must log authorize iTunes on each of these computers)
• Unlimited syncing with iPods
• Burning songs to a CD is not limited, but each Playlist (collection of songs) can only be burnt up to 7 times each.
• Videos can not be burnt to CD.