Rock & Roll is a genre of popular music that originated and evolved in the USA during the late 1940s and early 1950s, from musical styles such as gospel, blues, jazz, boogie woogie, Rhythm & Blues, Chicago blues, swing, folk and country music. The term Rock & Roll appeared in 1954 with Bill Haley’s song Rock Around the Clock.
In 1948, thanks to the mixing of Americans of different ethnic backgrounds and from different parts of the country during World War II, a new kind of music began to spread on the radio in roadside truck stops and juke joints.
Rock and Roll developed and emerged thanks to inventions such as the jukebox, the vinyl disc and the electric guitar. In the earliest rock and roll styles, either the piano or the saxophone was typically the lead instrument. These instruments were generally replaced or supplemented by the guitar in the middle to late 1950s.
Rockabilly usually refers to the type of rock 'n' roll music played and recorded in the mid 1950s primarily by white singers such as Elvis Presley, Carl Perkins, Johnny Cash, and Jerry Lee Lewis.
Rock & Roll is not just a musical style. It was depicted in movies, in fan magazines and on TV. It influenced lifestyles, fashion, attitudes and language. Rock and roll may have contributed to the civil rights movement because both African American and White American teenagers enjoyed the music. Later development of rock are centered on the use of the electric guitar, accompanied by the electric bass and the drums.
Over the years the term "rock" has become a generic term used to indicate a large variety of musical sub-genres that have developed over time. Over the years many genres originated from Rock & Roll: pop rock, hard rock, psychedelic rock, glam rock, heavy metal, punk rock and other genres of rock.