Daisy Bell, formally titled Daisy Bell (Bicycle Built for Two), is a late 19th-century popular song written by Harry Dacre in 1892. It became especially famous in tech and film culture because a computer at Bell Labs was used to sing it in the early days of speech synthesis, and HAL 9000 sings it in 2001: A Space Odyssey during his shutdown scene. That mix of music history, computing history and cinema keeps the clip recognizable online.