In the movie Alien the ship Nostromo has in it a computer which the crew refer to as "mother". In looking that up I found that "mother" is actually the MU-TH-UR 6000, but I have been unable to find what "MU", "TH" and "UR" stand for.

What does "MU-TH-UR" stand for?

MU-TH-UR inscription on panel

  • MU = Mainframe Unit?
    – alexwlchan
    May 2, 2014 at 21:09
  • According to that Wikia article, it was “2.1 terabyte” (I assume hard-drive); so perhaps TH = Terabyte Harddrive?
    – alexwlchan
    May 2, 2014 at 21:18
  • 2
    I'm fairly sure it doesn't stand for anything. There was also a FA/TH/UR in the 4th Alien film.
    – Valorum
    May 2, 2014 at 21:43
  • 1
    I don't believe there is a canon answer to what MU-TH-UR stands for. May 2, 2014 at 22:08

1 Answer 1


The acronym is undefined according to this Wikipedia article,

MU-TH-R 182 model 2.1 terabyte AI Mainframe/"Mother", the ship-board computer on the space ship Nostromo, known by the crew as 'mother,' in the SF horror movie Alien (cf Dark Star, above, which used a similar name and was co-written by the primary writer of Alien) (1979)

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