Mentats

Mentats is a chem in Fallout, Fallout 2, and Fallout Tactics: Brotherhood of Steel.

''A pillbox of mind-altering chems. Increases memory related functions, and speeds other mental processes. Highly addictive.''

Mentats is a reference to Frank Herbert's Dune. They are a profession of highly analytical thinkers with the ability to process information like a computer.