 Students over the years included flight surgeons, aerospace physiologists and aerospace physiology technicians on annual training; aerospace physiologists and aerospace physiology technicians during initial training; flight surgeons participating in USAFSAM's Residency in Aerospace Medicine (RAM) and Advanced Aerospace medicine for International Medical officers (AAMIMO) programs; and aviation safety officers from The U.S. Air Force, Navy, Marines, and Army, and from the Canadian Forces.Many of these new users recommended that the FAST product be transformed in several ways to make it more useful to operational units.FAST was used successfully by the development team, Air Force researchers, and several AF operational units to solve fatigue problems throughout AF operations.