The core of MCPS's activities is the licensing of its members' works for all mechanical reproductions, by record, video, broadcasting, and multi-media producers. Its members comprise music publishers and composers. Since its creation in the early part of this century, MCPS has built up an index of musical works, now computerised. In the mid 1980s, in order to improve the service it was oHering to its members, it was decided to create a product profile, giving detailed information on all UK releases.