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The Semiotic Standard For All Commercial Trans-Stellar Utility Lifter And Heavy Element Transport Spacecraft. (shortened to just "Semiotic Standard") was used in the film Alien in the ship Nostromo. It is a set of 34 symbols used to represent various concepts in the ship such as "coffee" or "radiation hazard". The original set included 31 symbols and was designed by Ron Cobb.
Colour Scheme
Red: Viable, Sound, Alive, Alertness
White/Grey: Life-supporting condition, pressure, temperature
Black: Vacuum, Death, Hazard
Yellow: Harmful, Active process, Molecular, Heat, Radioactive, Chemical
Blue: Lowered thermal condition
Green: Non-human organic substance.
References
Semiotic Standard Wikipedia(Text) CC BY-SA