Cleveland of Alan Freed − the Cleveland disc jockey credited with first using and popularizing the term "rock and roll" to describe the music genre. News/talk station WHK was one of the first radio stations to broadcast in the United States and the first in Ohio; its former sister station, rock station WMMS, dominated Cleveland radio in the 1970s and 1980s and was at that time one of the highest rated radio stations in the country. In 1972, WMMS program director Billy Bass coined the phrase "The Rock and Roll Capital of the World" to describe Cleveland. In 1987, "Playboy" named
Canadian Disc Jockey Association professional values and high standards that members are expected to follow. Individuals can apply for CDJA membership only after they have submitted a signed acknowledgement that they will conform to and operate within the code. The CDJA has 11 chapters across Canada. Canadian Disc Jockey Association The Canadian Disc Jockey Association (CDJA) is a not-for-profit trade association for disc jockeys across Canada. The CDJA was formed in 1976 and incorporated in 1978 to serve not only the disc jockey trade but the consumer, as well. It is a self-regulating association and operates under a national constitution and code of ethics.