1896-1920 - birth of jazz, blues, New Orleans; 1920-1935 - ragtime, dixie, Chicago, advent of radio; 1935-1944 - big band swing, jazz in Europe, big band vocalists; 1944-1949 - swing into bop, be-bop, progressive big bands, jump-jive into rhythm-and-blues; 1950-1954 - cool/West Coast, 'cool school' vocalists, Chicago rhythm-and-blues; 1955-1960 - hard bop, jazz populi, r&b into rock'n'roll; 1960-1966 - avant garde/free jazz, soul jazz; 1967-1970 - jazz rock; 1971-1980 - jazz fusion; 1980-1988 - new clssicism, Euro/free improvisers, international jazz & blues festivals; 1988-1990 - acid jazz; 1990-1996 - hip hop/jazz rap, European renaissance.