Mas, Más or MAS may refer to:

• Más y Menos, fictional superhero characters, from the Teen Titans animated television series
• "Más" (Breaking Bad), a season three episode of Breaking Bad

• Más (album), by Spanish singer Alejandro Sanz
• "Más", by José José from the 1985 album Promesas
• "Más", by Kinky from their 2002 album Kinky
• "Más" (Nelly Furtado song), from her 2009 album Mi Plan
• "Más" (Ricky Martin song), from his 2011 album Música + Alma + Sexo
• "Más", by Selena Gómez from her 2014 album For You
• "Más", a 2017 song by Cazzu
• "+" (song), Aitana and Cali y El Dandee from her 2019 album 11 Razones

• MAS 90, Sage accounting software
• Motu Audio System, now Digital Performer, audio sequencer software
• Multi-agent system, built of multiple interacting agents
• Malware Analysis System by FireEye

• Master of Advanced Studies, an academic degree
• Master of Advanced Study, a professional degree
• Master of Applied Science, a professional degree
• Master of Archival Studies, a professional degree
• Mescalero Apache Schools
• Macarthur Anglican School

• MAS (motorboat), Italian motor torpedo boats
• Manufacture d'armes de Saint-Étienne, a French government arms factory
  • MAS-49 rifle, a French semiautomatic rifle manufactured by them

• Malaysia Airlines, flag carrier of Malaysia
• Muerte a Secuestradores (Death to Kidnappers), a Colombian paramilitary group
• Football Association of Malaysia, by FIFA report code
• Mongolian Academy of Sciences, a Mongolian college
• Municipal Art Society, an urban planning organization based in New York City
• Muslim American Society, an Islamic revival and reform movement
• Macarthur Astronomical Society, a non-profit organization based in Sydney, Australia
• Maghreb Association Sportive de Fès, a Moroccan football club colloquially referred to by the acronym MAS
• Monetary Authority of Singapore, Singapore's central bank
• Museum aan de Stroom, museum in the city of Antwerp
• Museo de Arte Moderno y Contemporáneo de Santander y Cantabria, art museum in Santander, Spain
• Mujeres en Acción Solidaria, a Mexican feminist organization

• Mas de las Matas, Aragón, Spain

• Movement for Socialism (Argentina) (Movimiento al Socialismo), an Argentine political party
• Mouvement pour une Alternative Socialiste (Movement for a Socialist Alternative), a Belgian Trotskyist organization
• Movement toward Socialism (Bolivia) (Movimiento al Socialismo), a Bolivian political party
• Broad Social Movement (Movimiento Amplio Social), a Chilean political party
• Socialist Alternative Movement (Movimento Alternativa Socialista), a Portuguese Trotskyist political party
• Movement toward Socialism (Venezuela) (Movimiento al Socialismo), a Venezuelan political party

• Macrophage activation syndrome, a potentially life-threatening complication of several chronic rheumatic diseases of childhood
• The G protein-coupled receptor Mas, a critical part of the renin–angiotensin–aldosterone system (RAAS), encoded by the proto-oncogene MAS1
• Mandibular advancement splint, a device used to treat sleep apnea
• Marker assisted selection, a genome-tagging technique
• Meconium aspiration syndrome, neonatal aspiration of meconium
• McCune–Albright syndrome, a genetic disorder which results in precocious puberty
• Mixed amphetamine salts, an abridged generic name for Adderall, a stimulant drug

• Milliampere second (mAs), a fraction of an ampere hour, a unit of electric charge
• Milliarcseconds (mas), a unit of angular measurement
• Magic angle spinning, a technique used in solid state nuclear magnetic resonance spectroscopy

• Chennai Central railway station, code MAS

• Mas (surname), a surname
• Mas (Swedish term)
• MAS (band)
• Marco Antonio Solís, name abbreviation

• Malaysia, IOC country code
• Marshall Islands, UNDP country code
• Mas, short for masquerade, traditional Carnival costumes; see List of Trinidad and Tobago Carnival character costumes
• Mas (Provençal farmhouse)
• MÄS, a restaurant in Ashland, Oregon, United States
• Mas (restaurant), New York City
• Más+, a brand of beverages
• Mutual Admiration Society (disambiguation), various uses

• All pages with titles beginning with Mas
• All pages with titles containing Mas
• Mezzi d'Assalto, (Assault Vehicle), in the unit name Decima Flottiglia MAS
• Xmas (disambiguation)