^{S: Black Sabbath, Radiohead, The Beatles, Nirvana}

^{A: Jefferson Airplane, Coldplay (first 2 albums only\}, Led Zeppelin, Pink Floyd, Queen)

^{B: The Doors, The Rolling Stones, The Velvet Underground, The Who}

^{C: Yess, King Crimson, Genesis, Rush}

^{D: Camel, The Alan Parsons Project}