Windows XP was released by Microsoft in 2001, and its startup sound played automatically each time the system booted to the desktop. As XP became the default system in homes, schools and offices for much of the 2000s, the chime was heard daily by millions of users. After newer versions of Windows replaced it, the sound survived online in nostalgia edits, retro tech videos and memes about old computers starting up, where it now works as instant shorthand for that era of personal computing.