Government Computer News tells of how TetraUSS 2004, originally written for the Irix operating system that runs SGI workstations and custom ported to the Mac, has been awarded NASA's Software of the Year Award. TetraUSS 2004 (or Tetrahedral Unstructured Software System) is a fluid dynamics and aerodynamics analysis application used by NASA on over 300 computers is to simulate aerodynamics over aerospace vehicles.