The piece was commissioned by Microsoft for Windows 95 and composed by Brian Eno in 1994, after he was asked for music that was inspiring, futuristic and optimistic yet very short. Eno created dozens of tiny ambient sketches, and one became the startup sound heard on millions of PCs from the 1995 launch onward. As Windows 95 became a defining part of 1990s computing, the chime spread through retrospectives, parodies and nostalgia edits, and it remains a shorthand for the early internet and home PC era.