aUI first appeared in the 1962 publication "aUI: The Language of Space: Pentecostal Logos of Love & Peace" and is described by Weilgart to be a purely logical and rational language.
John W. Weilgart, a psychiatrist from Iowa of Austrian origin claims to have learned the language from a being of outer space. The word "aUI" means (in aUI) "mind-space-sound". Other books by the same author analyzing this language more deeply are "aUI: The Language of Space: For the First Time Represented and Adapted to the Needs of This Planet" (1967) and "Cosmic Elements of Meaning: Symbols of the Spirit's Life: A Cosmology for Mankind's Survival in the Atomic Age of Space" (1975).
aUI has 42 phonemes (including nasalized variations on the vowels for numbers), each with an associated meaning:
The language was designed so that ideally, the meaning of each phoneme would tie into its properties. The phoneme /b/, for instance, meaning "together", is pronounced with the lips pressed together. The short i, which means "light", takes the brightest, highest-frequency sound, while the long I, which means "sound", takes longer to say, because sound travels more slowly than light.
Each phoneme also has a character that represents its meaning. The symbol for a, meaning "space", for instance, is a circle to enclose an open space. The symbol for e, meaning "movement", follows the movement of a spiral nebula. The u, meaning "human", is a caret shape, suggesting two legs. The o, meaning "life", is represented by the shape of a leaf, plants and photosynthesis forming the basis of all life. The v, meaning "active", is represented by a lightning bolt, the most active thing in nature. The character for g, meaning "inside", is a dot inside a circle. The character for t, meaning "toward", is a split arrow shape pointing towards the right.
aUI attempts oligosynthesis.