MSN Messenger launched in 1999 as Microsoft's instant messaging service and became a staple of home computing through the 2000s before it was retired in 2013 in favor of Skype. Its short alert tone was heard daily in bedrooms, schools, and internet cafes whenever contacts signed in or sent a message. As clips and edits celebrating early internet culture grew on social media, the chime resurfaced as a ready-made nostalgia cue, now used far beyond its original software to instantly signal an incoming chat online.