USAS or Usas may refer to: Uṣas or Ushas, a Hindu goddess Uşas, a platform game for the MSX 2 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 United Students Against Sweatshops, a United States student organization for worker rights USAS-12, an automatic shotgun