USAS

USAS or Usas may refer to:
 * Uṣas or Ushas, a Hindu goddess
 * Uşas, a platform game for the MSX 2
 * USAS (Outer Limits), a space organization in a series of Outer Limits episodes
 * USAS, the ship prefix for "United States Army Ship"
 * USAS (application), a set of applications used by the airline, transportation, and hospitality industries
 * United States Air Service, a precursor to the United States Air Force
 * United States Antarctic Service, a former name of the United States Antarctic Program
 * United Students Against Sweatshops, a United States student organization for worker rights
 * USAS-12, an automatic shotgun