Classic rock is an umbrella term coined in the 1980s to describe the most popular rock acts of the late 1960s and '70s. The term applies to a disparate assortment of artists who played different styles of music and whose only commonly shared attributes are that they all enjoyed considerable airplay on FM radio and sold millions of albums. Classic rock encompasses Pink Floyd's space rock, the progressive rock of Jethro Tull and Yes, Alice Cooper's satirical hard rock and the southern twang of the Allman Brothers Band and Lynyrd Skynyrd. Guitar-dominated classic rock bands like Led Zeppelin, Rush and Aerosmith remain as popular today as they were in the late '70s.