AM, Am, or am may refer to:

• Master of Arts (postgraduate), (Artium Magister) alternative abbreviation for a Master's degree in Arts
• Americium, a chemical element with symbol Am
• Arthur-Merlin protocol, an interactive proof system in computational complexity theory
• Automated Mathematician, an artificial intelligence program
• Attometre (am), a unit of length (equal to 10^–18 m)
• Order of Australia member (postnominal)
• Accelerated Math in the US or Accelerated Maths in the UK
• Andy Milonakis, an American comedian

In medicine and psychology

• Adrenomedullin, a protein
• Autobiographical memory

In timekeeping:

• Ante Meridiem, in 12-hour clock notation, Latin for "before noon" (also written A.M., a.m., and am)
• Anno Mundi, a Calendar era counting from the creation of the world
• Anno Martyrum, used in the Coptic calendar

In communications:

• "Away message", see status message (IM)
• "Above mentioned" in Internet slang
• Airmail
• AM broadcasting, radio broadcasting using amplitude modulation

In entertainment:

• All Music Guide, a music database
• AM (ABC Radio), radio current affairs programme
• A.M. (musician), musician Andrew Moore aka "A.M."
• A.M. (album), album by rock band Wilco
• AM (fictional computer), a fictional evil supercomputer in the short story I Have No Mouth, and I Must Scream
• A-minor (Am), a minor chord in music
• The Arctic Monkeys, a British Indie band
• American Morning, the morning news program on CNN
• A fictional petroleum company in Grand Theft Auto: Liberty City Stories

In geography:

• Americas (as in Pan-Am and Trans-Am)
• Armenia (ISO country code AM)
• Anguilla (MARC country code am)
• Amazonas State, Brazil
• Amharic language (ISO 639-1 language code am)
• Amran Governorate, Yemen (ISO 3166-2:YE)

In sports:

• Attacking midfielder in soccer

In transportation:

• Aston Martin
• Aeroméxico (IATA airline designator)
• Asia Miles, a Cathay Pacific travel reward programme
• Arkansas and Missouri Railroad, a short-line railroad headquartered in Springdale, Arkansas
• A.M. (1906 automobile), an early French automobile

In the military:

• Air Marshal, a military rank in the Royal Air Force and many Commonwealth air forces
• Air Medal, a military decoration
• Minesweeper (ship), U.S. Navy 1921 warship classification code
• Anti-materiel rifle, a weapon for use against material rather than combatants

In UK Politics:

• Assembly Member of the National Assembly for Wales or London Assembly

In computing:

• .am, the top-level domain for Armenia

[ See also

• A&M
• AM2