The lowdown on Zork’s name, inasmuch as a lowdown has been provided in print, was given by authors Dave Lebling, Marc Blank, and Tim Anderson in 1979 in the article “Zork: A Computerized Fantasy Simulation Game,” Computer 12:4, 51-59 (April 1979):
The first version of Zork appeared in June 1977. Interestingly enough, it was never “announced” or “installed” for use, and the name was chosen because it was a widely used nonsense word, like “foobar.”
This is a clear explanation, but it raises the question of how this particular nonsense word came into wide use at MIT. It seems reasonable to pursue this question, and reasonable that there would be some discernable answer. After all, there’s a whole official document, RFC 3092, explaining the etymology of “foobar.” It could be interesting to know what sort of nonsense word “zork” is, since it’s quite a different thing, with very different resonances, to borrow a “nonsense” term from Edward Lear or Lewis Carroll as opposed to Hugo Ball or Tristan Tzara. “Zork,” of course, doesn’t seem to derive from either humorous English nonsense poetry or Dada; the possibilities for its origins are more complex.