Music history of the United States in the 1950s blues and gospel music; with country and western and Pop. In 1951, Cleveland, Ohio disc jockey Alan Freed began playing rhythm and blues music for a multi-racial audience, and is credited with first using the phrase "rock and roll" to describe the music, though the terms "rocking" and "rolling" were being used in boogie-woogie and religious music for decades before that. The 1950s saw the growth in popularity of the electric guitar (developed and popularized by Les Paul). Paul's hit records like "How High the Moon," and "The World Is Waiting for the Sunrise," helped lead to the development of
Canadian Disc Jockey Association 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. Its members either belong to one of many chapters in major cities across Canada or in some cases, where there is not one nearby, they are known as "unchaptered" or National members. The CDJA has established a code of conduct specifying the