The songs are sung partially by Roger Waters but mainly by PP Arnold on both the original album and live shows.
Stanley, for you, and for all the other book burners...The message climaxes with Waters yelling in the aggressive Scottish voice he used to depict the character of the teacher in The Wall.
In an interview with Rockline on 8 February 1993 Roger Waters stated that he had wanted to use samples of HAL 9000 from 2001: A Space Odyssey on the album.
[1] Since this incident Waters has used the audio of HAL describing his mind being taken away during the introduction of "Perfect Sense, Part I" in live performances, such as the In the Flesh tour in 2002, after Kubrick had died.
The opening lines of the song begin with a reference from the film 2001: A Space Odyssey in which "The monkey sat on a pile of stones and stared at the broken bone in his hand".