HSAS may refer to:
- Hagar Schon Aaronson Shrieve, a rock supergroup from California
- Homeland Security Advisory System, an American color-coded terrorism threat advisory scale
- Hydrocephalus, a congenital disorder colloquially known as 'water on the brain'
- High School of American Studies, a specialized public high school in Bronx, New York
See also
Topics referred to by the same term This disambiguation page lists articles associated with the title HSAS.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: