Alien Glossary

Alien Glossary

MU-TH-UR 6000 (Mother)

MU-TH-UR, dubbed "Mother," by the crew, is the computer system that governs the operation of the USCSS Nostromo. This is the system that controls Stasis sleep and navigation back to Earth, awaking the crew when it receives a mysterious signal from a nearby source. It is one of the primary symbols for technology in Alien, and is used to reveal Ash's ulterior motives to Ridley. It is also highly interactive, creating high-tension situations in which the crew tries to make use of Mother to fight the Alien threat, but alas, Mother is not able to save them and is used in the end to destroy the Nostromo upon the final escape. 

USCSS Nostromo

The Nostromo is an American Spacecraft which is used to transport material through space as a tug. That is, until the owner corporation attempts to use the vessel to transport a dangerous alien life-form back to Earth to exploit the scientific discover for profit. The crew aboard the Nostromo fight against their demise and eventually evacuate on the "life-raft" shuttle as the Nostromo self-destructs.

The Alien

In sequel films referred to as a Xenomorph, the Alien is responsible for the death of most of the crew members aboard the Nostromos. The corporation that sent the vessel seeks to study the Alien and profit from its discovery. Ash refers to the beast as the "perfect organism," and as "Kane's son." The monster is bipedal and has corrosive blood, making its extermination a truly difficult feat for the crew members aboard the Nostromos. 


Due to the lengthy travels aboard the spacecrafts in the 22nd century, a computer governed sleep system is employed to allow the the crew to be asleep for the majority of the long space journey. When a distress signal is received by MU-TH-UR, the computer ends Stasis sleep prematurely so the crew can respond to the signal. At the end of the movie, Ridley places her and another survivor back into hypersleep until they arrive back on Earth.

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