Bebop or bop is a style of jazz characterized by fast tempo, instrumental virtuosity and improvisation based on the combination of harmonic structure and melody. It was developed in the early and mid-1940s. It first surfaced in musicians' argot some time during the first two years of American involvement in the Second World War. This style of jazz ultimately became synonymous with modern jazz, as either category reached a certain final maturity in the 1960s.

The word "bebop" is usually stated^{[by whom?]} to be nonsense syllables (vocables) which were made in scat singing, and is supposed^{[weasel words]} to have been first attested^{[by whom?]} in 1928. Some researchers^[who?] speculate that it was a term used by Charlie Christian, because it sounded like something he hummed along with his playing.Dizzy Gillespie tells that the audiences coined the name after hearing him scat the then-nameless tunes to his players and the press ultimately picked it up, using it as an official term: "People, when they'd wanna ask for those numbers and didn't know the name, would ask for bebop."

John Birks "Dizzy" Gillespie ( /ɡɨˈlɛspi/; October 21, 1917 – January 6, 1993) was an American jazz trumpeter, bandleader, composer and, occasionally, singer.

Allmusic's Scott Yanow wrote, "Dizzy Gillespie's contributions to jazz were huge. One of the greatest jazz trumpeters of all time (some would say the best), Gillespie was such a complex player that his contemporaries ended up copying Miles Davis and Fats Navarro instead, and it was not until Jon Faddis's emergence in the 1970s that Dizzy's style was successfully recreated . . . Arguably Gillespie is remembered, by both critics and fans alike, as one of the greatest jazz trumpeters of all time."

Gillespie was a trumpet virtuoso and improviser, building on the virtuoso style of Roy Eldridge but adding layers of harmonic complexity previously unknown in jazz. His beret and horn-rimmed spectacles, his scat singing, his bent horn, pouched cheeks and his light-hearted personality were essential in popularizing bebop.

In the 1940s Gillespie, together with Charlie Parker, became a major figure in the development of bebop and modern jazz. He taught and influenced many other musicians, including trumpeters Miles Davis, Fats Navarro, Clifford Brown, Arturo Sandoval, Lee Morgan, Jon Faddis and Chuck Mangione.

Benny Golson (born January 25, 1929) is an American bebop/hard bop jazz tenor saxophonist, composer, and arranger.

While in high school in Philadelphia, Pennsylvania Golson played with several other promising young musicians, including John Coltrane, Red Garland, Jimmy Heath, Percy Heath, Philly Joe Jones, and Red Rodney. After graduating from Howard University Golson joined Bull Moose Jackson's rhythm and blues band; Tadd Dameron, whom Golson came to consider the most important influence on his writing, was Jackson's pianist at the time.

From 1953 to 1959 Golson played with Dameron's band and then with the bands of Lionel Hampton, Johnny Hodges, Earl Bostic, Dizzy Gillespie, and Art Blakey and the Jazz Messengers with whom he recorded the classic Moanin' in 1958.

Golson was working with the Lionel Hampton band at the Apollo Theater in Harlem in 1956 when he learned that Clifford Brown, a noted and well-liked jazz trumpeter who had done a stint with him in Hampton's band, had died in a car accident. Golson was so moved by the event that he composed the threnody "I Remember Clifford", as a tribute to a fellow musician and friend.

Charles Parker, Jr. (August 29, 1920 – March 12, 1955), also known as Yardbird and Bird, was an American jazz saxophonist and composer.

Parker acquired the nickname "Yardbird" early in his career and the shortened form, "Bird", which continued to be used for the rest of his life, inspiring the titles of a number of Parker compositions, such as "Yardbird Suite", "Ornithology", "Bird Gets the Worm", and "Bird of Paradise."

Parker was a highly influential jazz soloist and a leading figure in the development of bebop, a form of jazz characterized by fast tempos, virtuosic technique, and improvisation. Parker introduced revolutionary harmonic ideas, including rapidly passing chords, new variants of altered chords, and chord substitutions. His tone ranged from clean and penetrating to sweet and somber. Many Parker recordings demonstrate virtuosic technique and complex melodic lines, combining jazz with other musical genres, including blues, Latin, and classical.

Parker was an icon for the hipster subculture and later the Beat Generation, personifying the jazz musician as an uncompromising artist and intellectual, rather than an entertainer.