Brian Eno composed The Microsoft Sound for the launch of Windows 95 in 1995, after Microsoft asked for a short piece that felt welcoming, optimistic and futuristic. The chime played as the operating system finished starting up, and as Windows 95 spread to homes and offices around the world, the sound became one of the most recognised pieces of computer audio ever made. Decades later it survives in retro computing videos, technology documentaries and internet memes, where a fraction of a second is enough to place a scene firmly in the mid-1990s.