Copyright protection exists for original works of authorship that involve some minimal level of creativity. The work must be fixed in a tangible medium of expression so that it can be perceived, reproduced, or otherwise communicated, either directly or with the aid of a machine/device. Works of authorship include: (1) literary works; (2) musical works; (3) dramatic works;(4) pantomimes and choreographic works; (5) pictorial, graphic, and sculptural works; (6) motion pictures and other audio-visual works; and (7) sound recordings. Ideas, concepts, principles, or methods of operation are not subject to a copyright, but the original work that is authored or created from such ideas or concepts may become subject to a copyright.