Fas

Fas may refer to:

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

FAS may stand for:

Businesses

Fiat Automobili Srbija, an automobile-manufacturing company based in Kragujevac, Serbia
Film Authors' Studio, a Croatian film-production company

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
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
Foras Áiseanna Saothair, a state agency in Ireland responsible for employment assistance
Foreign Agricultural Service, a service of the U.S. Department of Agriculture with primary responsibility for overseas programs
Freedom and Solidarity, a conservative liberal political party in Slovakia
Fuerzas Armadas de España, the Spanish Armed Forces

Fabric-attached storage for computer data
Fatty acid synthase
Feedback arc set, a concept in graph theory
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, a permanent and often devastating birth-defect syndrome caused by overconsumption of alcohol during pregnancy
Final assembly schedule, schedule for items to finish in a make-to-order (MTO) or assemble-to-order (ATO) environment
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

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
Financial Accounting Standard, a standard determined by the Financial Accounting Standards Board
Free African Society, an 18th-century African-American community
Free Alongside Ship, an Incoterm