DRM encompasses multiple technologies that control the use of software, music, movies or any other piece of digital content. A year ago, Apple CEO Steve Jobs wrote an open letter urging the music industry to drop DRM. Although Apple’s iTunes still sells a lot of content protected with Apple’s “FairPlay” DRM software, songs from EMI Music’s entire catalog are now available DRM-free through iTunes. Amid declining sales, the major music labels are experimenting with new business models, including dropping their previous requirement to protect their music through DRM software.

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