Hipgnosis: Designed the iconic cover art, along with graphic artist George Hardie.
Killer App: The album was one for CDs, as well as high-end audio equipment in general. So many people wanted a copy of one of the best-sounding recordings ever made in a format that wouldn't wear out like vinyl or tape that EMI had a CD plant dedicated to nothing but The Dark Side of the Moon in The '80s.
It was also seen as such for Quadrophonic (4-channel surround) sound systems, which used specially-made vinyl albums and 8-track tapes, which tried to gain traction during the 70's.
A 5.1-channel surround mix was released on Super Audio CD (a CD format developed by Sony & Philips that tried to gain traction before the advent of Blu-ray), for the album's 30th anniversary in 2003.
What Could Have Been: Paul McCartney and his wife Linda were interviewed for the voices on the album, but their responses weren't as interesting as the others and the recordings weren't used. Interviewed for John Harris' The Dark Side of the Moon: The Making of the Pink Floyd Masterpiece, Waters said that their answers were "trying too hard to be funny".