In Ancient Times, Industrial Light and Magic was on Usenet, and maybe the Internet, via a system named dagobah.

I worked in a computer graphics group that used artist names, like vermeer, escher, davinci, etc. My system was bonestell. In another group I was in, we used names of dances, like bolero, foxtrot, tango, etc. The guy who suggested bolero was thinking of Bo Derek, but I took the idea of dance names and ran with it. My system was tarantella, which was hard enough to spell that people stayed off of it.

At home, I don't follow a pattern, but I have used names from "A Wrinkle in Time". My first quad core linux system was called tesseract and my Windows box was camazotz. I've always like the names of the earliest computers like ENIAC, EDSAC, UNIVAC, etc., so I named my Mac Pro prozac. I've considered naming my two raspberry pis colossus and guardian...