AOL Instant Messenger launched in 1997 and ruled online chat through the early 2000s, when millions of teens kept its buddy list open for hours. Its signature audio cues — a door creak for friends signing on and off, and a crisp chime for every incoming instant message — became the soundtrack of the dial-up era. As AIM faded and finally shut down in December 2017, its sounds survived as pure nostalgia, resurfacing in meme edits, vaporwave tracks and throwback TikToks that instantly transport viewers back to 2003.