BE-DOOT BE-DOOT. BE-DOOT BE-DOOT. That's the default alert sound for one of my old cell phones or PDAs - probably the Palm or iPod Touch. I heard it while I was walking around on a different floor of my office today and I momentarily freaked out. What appointment was I missing???
I get a strange nostalgia when I hear the noises of electronic devices that I don't use anymore.
See also: phantom cell phone vibrate syndrome.