TetrUSS is a suite of computer programs used for fluid dynamics and aerodynamics analysis and design. The TetrUSS system was developed at NASA Langley Research Center during the 1990s to bring the state-of-the-art in computational fluid dynamics (CFD) to a higher level of utility, and is geared towards novices and experts alike. The software, originally developed for NASA internal applications, has gradually evolved into an efficient and versatile CFD tool used by engineers and scientists throughout the nation. TetrUSS has been employed in major NASA research programs such as High Speed Research / High Speed Civil Transport, Hyper-X, Abrupt Wing Stall, Mars Scout, Joint Strike Fighter, and many other smaller projects (some recent applications of Mac OS X TetrUSS are shown here). The software is widely used in other government organizations, the aerospace industry, academia, and non-aerospace industries such as automotive, bio-medical, and civil engineering. TetrUSS was the recipient of the prestigious NASA Software of the Year award in 1996.