system
A chat on subreddit /r/NoStupidQuestions
human
It's the other side of the vinyl record. When you play a vinyl record in a record player, the first half of the album plays when you play the A side, with the stylus touching it. To play the second half - the B side - you flip the record.
gpt
It is also used to refer to ‘bonus’ or additional songs on an album/CD