Apple Inc.  Prior to March 2009, digital music files with digital rights management were available for purchase from the iTunes Store, encoded in a proprietary derivative of the  AAC format that used Apple's FairPlay DRM system.
<meaning-changed> Apple Inc.  Prior to March 2009, digital music files with digital rights management were available for purchase from the iTunes Store, encoded in a proprietary derivative of the  AAC format that used Apple's FairPlay DRM system.
Apple Inc. Criticism of Apple Inc. Accusations of anti-competitive behavior Prior to March 2009, digital music files with digital rights management were available for purchase from the iTunes Store, encoded in a proprietary derivative of the AAC format that used Apple's FairPlay DRM system.