This chapter defines copyright as arising whenever a work is created under qualifying conditions. The Copyright, Designs, and Patents Act 1988 (CDPA) defines eight types of work that fall under two categories: works that must be original or ‘authorial works’, including literary works, dramatic works, musical works, and artistic works; and works that need not be original or ‘entrepreneurial works’: films, sound recordings, broadcasts, and the typographical arrangement of published editions. Copyright is infringed by copying or communicating the whole or a substantial part of a work—referred to as primary infringement—or by dealing in infringing copies of a work—referred to as secondary infringement. There are some major and many minor defences to copyright infringement including the ‘fair dealing’ defences and the public interest. Many aspects of copyright law have been harmonized by the European Union.