ICQ launched in 1996 as one of the first widely used instant messaging services, letting people chat in real time, keep contact lists and send messages across the early internet. Its short incoming message alert became one of the most familiar sounds of that era, heard in homes and offices whenever a new message arrived. As later apps replaced ICQ, the sound survived mainly through nostalgia, shared in retro computing videos, memes and soundboards. Today creators use it as instant shorthand for the early internet, old-school chatting and a message arriving out of nowhere.