AOL Instant Messenger, launched by AOL in 1997, became one of the most popular chat services of the late 1990s and early 2000s, and its door-creak notification sound became instantly recognisable to a generation of users. As AIM faded, the sound lived on in YouTube nostalgia compilations, TikTok edits, and meme videos that recreate early internet culture. Its short length and distinctive creak make it an easy shorthand for a message arriving, which is why creators still reach for it when they want a retro online moment.