Starting with the debut of Windows 3.1 in 1992, Microsoft added startup and shutdown sounds to its operating systems, and now you can take a trip down memory lane with this video, hearing them all in one place. Jeez, Windows 7 sure has come a long way.
Notice how sounds bring back memories of the time when you first heard them? Try to recall what you were doing when you first heard these sounds. And young people, go ahead and ask your grandpa what it was like when he had to run Windows by candlelight.
You can also get a clue about the synthesizer technology of each era, steadily improving with each iteration. Also notice the extraordinary production and creative quality of the sounds, each making its way through numerous committees and revisions until all were satisfied. Which one's your favorite?