Microsoft Windows XP was released in 2001, and its startup sound was part of the operating system's default sound scheme, played automatically after the system loaded to the desktop. As millions of home, school, and office computers used XP for over a decade, the chime became one of the most familiar computer sounds in the world. After XP was retired, the clip spread online through nostalgia videos, memes, and soundboards, where it now signals old computers, the early internet era, and a simpler time in personal computing.