MSN Messenger, launched by Microsoft in 1999 and later renamed Windows Live Messenger, defined instant messaging for many users in the early and mid-2000s before it was retired in 2013. Its default new message chime became part of everyday computer life alongside contacts lists, emoticons and nudges. As retro internet culture grew on video platforms, the sound returned as shorthand for that era, often contrasted with the modern Discord notification that serves a similar purpose today. It remains popular because it instantly signals an incoming message without needing any explanation.