Fas

Fas can mean the following:


 * Fas receptor, an important cell surface receptor protein of the TNF receptor family known also as CD95, that induces apoptosis on binding Fas ligand.
 * Fes, Morocco, the third largest city in Morocco, as an alternate spelling
 * Poti, Georgia, a port city in Georgia
 * Latin for "permissible, right" as a concept of ancient Roman religion; see Glossary of ancient Roman religion

FAS can stand for:
 * fetal alcohol syndrome
 * Architecture and Surveying Institute, formerly the Faculty of Architects and Surveyors
 * Faculty of Arts and Science
 * Harvard Faculty of Arts and Sciences
 * University of Toronto Faculty of Arts and Science
 * Fatty acid synthase
 * Federal Aid Highway System, roads built in the United States with funds provided by the federal government
 * Federally assisted secondary road, roads built in the United States with funds provided by the federal government
 * Federation of American Scientists, a non-profit organization formed in 1945 by scientists from the Manhattan Project
 * Federation of Astronomical Societies, an international union of astronomical societies formed in 1974
 * Femmes Africa Solidarité
 * Ferrous Ammonium Sulfate (Mohr's Salt), a light green crystalline solid with the formula Fe(SO4)2(NH4)2.6H2O (CAS number: 10045-89-3)
 * Fetal Alcohol Syndrome, permanent and often devastating birth-defect syndromes caused by maternal overconsumption of alcohol during pregnancy
 * Financial Accounting Standard, a standard determined by the Financial Accounting Standards Board
 * Final assembly schedule, schedule for items to finish in a make-to-order (MTO) or assemble-to-order (ATO) environment.
 * Football Association of Serbia
 * Football Association of Singapore
 * Foras Áiseanna Saothair, a state agency in the Republic of Ireland, with responsibility for assisting those seeking employment.
 * Forced Auto Stop, a hypermiling technique involving turning off an automobile's internal combustion engine, shifting into neutral and coasting down hills to reduce gasoline use.
 * Foreign Accent Syndrome, a rare medical condition whereby a person acquires a different accent when speaking their own language, usually as a result of brain damage.
 * Foreign Agricultural Service, the part of the United States Department of Agriculture that has primary responsibility for overseas programs
 * Free African Society, an 18th-century African-American community.
 * Free Alongside Ship, an Incoterm
 * Freedom and Solidarity, a conservative liberal political party in Slovakia
 * Fuerzas Armadas de España, the Spanish Armed Forces
 * Club Deportivo FAS, a Salvadoran football club