ICQ was one of the first widely used instant messaging services, launched in 1996 and popular through the late 1990s and 2000s for its contact lists, status messages, and distinctive notification sounds. Later versions, including ICQ 6, kept that familiar audio identity as the service evolved. As newer chat apps replaced it, the login chime survived on soundboards and in online nostalgia, where creators reuse it to signal old-school internet culture, early online friendships, and a time when going online felt like an event in itself.