This chime was the shutdown sound for Microsoft's Windows 2000 operating system, played when a user closed the system down at the end of a session. Similar in style to the sounds used in Windows ME, it belonged to an era when desktop computers announced every action with a short musical cue. As those machines disappeared, the clip survived on soundboards and in nostalgia videos, where it now works as instant shorthand for old technology, the late 1990s office and the satisfying end of a long day at a computer.