Hard bop is a subgenre of jazz that is an extension of bebop. Journalists and record companies began using the term in the mid-1950s to describe a new current within jazz that incorporated influences
Art Blakey and the Jazz Messengers, 1960. Pictured are Lee Morgan (left), Jymie Merritt (center), and Art Blakey (right) (saxophonist Wayne Shorter stands mostly hidden behind Merritt).