Digital rights management (DRM) is a class of controversial technologies that are used by hardware manufacturers, publishers, copyright holders, and individuals with the intent to control the use of digital content and devices after sale; there are, however, many competing definitions. With First-generation DRM software, the intent is to control copying while Second-generation DRM schemes seek to control viewing, copying, printing, and altering of works or devices. The term is also sometimes referred to as copy protection, copy prevention, and copy control, although the correctness of doin...