Why "Daisy" in 2001: A Space Odyssey?

Why did the HAL 9000 computer sing “Daisy Bell” in the 1968 science fiction film 2001: A Space Odyssey, written by Stanley Kubrick and Arthur C. Clarke?
Maybe this video clip, taken from a documentary where Arthur C. Clarke is visiting Bell Labs back in the early 60s, will give you an answer to that question.

















