Just an idea!!!

[progdirjim(Admin)]

here's a (I think) easy one while Keith conjures up a winner:

What do these three albums have in common:

Pink Floyd - Atom Heart Mother
Latte E Miele - Papillon
Procol Harum - A Salty Dog

hint - it has nothing to do with musical instruments, year/studio recorded, or the musicians involved. A very common thing is mentioned or hinted at someplace in each of these three albums. For instance, it might be in the album title, the band's name, a song title, or the cover art.