Microsoft introduced Windows XP in 2001, and its short startup chime became one of the most recognisable computer sounds of the decade. It played millions of times a day as home and school PCs booted up, and it quickly became shorthand for the early internet era. As XP remained in use for many years, the melody stayed familiar long after newer systems replaced it. Today it survives in nostalgia edits, retro computing videos and memes, where a few seconds of the chime immediately place a scene in the 2000s.