The sounds a Mac makes are iconic and easily identified. For example, when I saw Pixar's "Wall-E" on opening night, I knew immediately what percentage of the audience used Macs from the giggles I heard after the titular robot finishes recharging, which ends with the Mac's startup chime. You may also know the story of Sosumi (a made-up word that, when said aloud, is "so sue me").
What happens when you put the Mac's sounds together? Hear it yourself: Designer and musician Mike Soloman created a catchy tune made up entirely of Mac sounds in GarageBand. I especially like that he included a screencast of GarageBand playing the song (and that he threw in the Wilhelm scream at the end). Soloman has made his GarageBand file available for download, as well as an audio file of the song.