A heap, in the context of data structure, is a tree-based data structure that satisfies the heap property, where each element is assigned a key value, or weighting. The lower value key always has a parent node with a higher-value key. This is called a max-heap structure, and among all nodes, the root node has the highest key. Sometimes, a...
DRM-free refers to media without digital rights management (DRM). DRM-free technology permits software to bypass access control technologies used in media protected by copyright laws. Due to consumer frustration with the inability to play digital music on any device they choose, and for as long as they want, DRM-free products are becoming more popular.
Napster began providing DRM-free MP3 music in 2009. Apple also provides digitally recorded music as DRM-free through iTunes. Apple also provides casual copying (defined as unshared, non commercial digital media usage) by way of their FairPlay DRM software. Furthering the new U.S. law, copyright owners can be fined if they add DRM software to media that is ruled as exempt. Amazon also provides DRM-free music. However, consumers should be forewarned about reading the fine print from the companies such as Apple, since limitations may be included.
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