Progressive Rock: A genre of rock music that is ambitious in the scope of its design and composition. Progressive rock deploys an eclectic mix of styles such as classical, jazz, and rock melodies. Progressive rock albums often have the performative scope of operatic rather than song-inclusive works. It used to be on rock albums, a single song ended the meaning of what the band was trying to convey-but progressive rock albums often have a theme and an overarching musical narrative. Progressive rock was more popular and influential in the 1960s and 1970s amongst English and Canadian bands, and drew more of its performative attitudes from musicals and opera as well as classical music than country or blues as did American bands of the era.

             Yes: Progressive-sounding British progressive rock band formed in the late 1960s but most famed for its composition "Owner of a Lonely Heart" in the 1980s. This composition introduced innovative electronic sounds to the traditional progressive rock style and instrumentation.

             Jethro Tull: The British, predominantly Celtic-influenced Progressive Rock band led by Ian Anderson whose long composition "Thick as a Brick" lasted over 40 minutes and thus exemplified the boundary-breaking nature of the Progressive Rock genre.

             Emerson, Lake & Palmer: One of the earliest British progressive rock bands, founded during the 1960's and credited with beginning the use of concept albums for progressive rock bands.

             King Crimson: This British band began as a traditionally Progressive Rock band, but continued to update its style with the times, often resulting it being called 'neo progressive.".

             Steely Dan: A jazz, rock, funk, rhythm & blues, and even pop-infused sounding studio band. Rather than going on tour and playing to audiences, Steely Dan created music to be listened to in the privacy of one's home. The band is noted for its use of reverb and complex lyrics such as found in its 1972 hit "Reelin' In The Years.