Trivia: In the scene where Alex approaches the two girls at the record stand you can see the original score for 2001: A Space Odyssey, also directed by Stanley Kubrick.
Suggested correction: The album shown in the picture is NOT, as is commonly believed, the soundtrack of 2001, but rather a compilation of movie theme music that includes the main theme of 2001. However, the ACTUAL soundtrack of 2001 is still visible in the scene, just a little earlier: When Alex finishes flipping through a magazine and tosses it down on a counter, one of the records in that shot is the 2001 soundtrack.
Trivia: The movie is actually not the entire story of the book. The US release was published without the final chapter because Burgess' New York publisher thought it was a kill joy and believed US audiences wouldn't like it. Stanley Kubrick decided to write the movie based on the US version, thus leaving out the final chapter.
Suggested correction: This isn't entirely accurate. Kubrick didn't "decide" to use the American version; that was simply the one he'd read and based the screenplay on before he ever knew there was another version. He later said that he only became aware of the missing chapter late in the writing process and, since he was so far along, decided against using it.