ICQ launched in 1996 as one of the first widely used instant messaging programs, and its user online chime quickly became one of the most recognisable sounds of the early internet. As millions of people logged in to chat with friends, hearing that short alert meant someone you knew had just arrived. Decades later it survives in nostalgic videos, retro tech edits and memes about dial-up era life, often compared with a modern Discord notification, because it instantly evokes a time when being online felt new and social.