When I worked on the Hubble Space Telescope in the late 90's I kept hearing the electrical guys talking about the new computer we were going to install. They called it simply, "the 486". I one day joked that I had had a 486 a few years ago in college and maybe they could use that and save some bucks. And they told me it was the same thing - literally an intel 486 processor. They said that the design happened to be very resistant to radiation, and met their purposes very well.

I haven't really kept up on it since, but I believe it's still running a humble 486. Granted, the rest of the machine isn't much like my old Dell, but I always found that interesting.