AM

AM or similar may refer to:

Natural science

• Americium, a chemical element
• Adrenomedullin, a protein
• Air mass (astronomy)
• Am, a Köppen climate classification code

Timekeeping

• Ante meridiem, in 12-hour clock notation, Latin for "before noon"
• Anno Mundi, a calendar era based on the Biblical creation of the world
• Anno Martyrum, a method of numbering years in the Coptic calendar

Media, music and entertainment

• AM (ABC Radio), an Australian radio programme
• A.M. (album), by Wilco
• AM (musician), an American musician and producer
• A.M. (musician), a Canadian electronic musician
• A minor, a minor scale in music
• American Morning, an American television program
• Amplitude modulation, an electronic communication technique
• AM broadcasting, radio broadcasting using amplitude modulation
• DJ AM, an American DJ and producer
• AM, a fictional supercomputer in the short story "I Have No Mouth, and I Must Scream"

Transportation

• A.M. (automobile), a 1906 French car
• Aeroméxico, IATA airline code AM
• Arkansas and Missouri Railroad
• Aston Martin, a British luxury car manufacturer

Military

• Air marshal, a senior air officer rank used in Commonwealth countries
• Anti-materiel rifle
• Aviation Structural Mechanic, a U.S. Navy occupational rating

Offices and honors

• Master of Arts, an academic degree
• Member of the Order of Australia
• Assembly Member (disambiguation), a political office

Other uses

• .am, an Internet domain
• Attometre, a unit of length
• Additive manufacturing, a collection of techniques to make objects from 3D data
• Advanced manufacturing
• Automated Mathematician, an artificial intelligence program
• Armenia, ISO country code AM
• Amharic language, ISO 639-1 language code am
• am, a form of the verb "to be"
• AM, a complexity class related to Arthur–Merlin protocol

See also

• `am (disambiguation)
• A&M (disambiguation)
• AM2 (disambiguation)