The Theoretical Propulsion Group was a scientific body that existed within the United Federation of Planets. Based at Utopia Planitia on Mars, the TPG was responsible for developing the warp drive systems of Starfleet's Galaxy- and Nebula-class starships. (TNG episode: "Booby Trap")

Leah Brahms was a member of this group, with Mikel Gordanez as her superior. (TNG novel: The Genesis Wave, Book One)

In 2369, the Theoretical Propulsion Group studied a sample of Dreman dilithium from Drema IV, and determined that adjustments to standard warp drive technology would be necessary to make optimal use of this new variety of dilithium. (SCE eBook: Progress)

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