Machine learning
Macroeconomics
Macrosociology
Magazine
Magnetism
Magnetohydrodynamics
Magnetospheres
Malacology
Mammalogy
Management
Management cybernetics
Management information systems
Managerial economicss
Maneuver
Manufacturing engineering
Manuscriptology
Marine biology
Marine chemistry
Marine engineering
Maritime archaeology
Market economy
Marketing
Marxian economics
Marxism
Marxist sociology
Masculinity
Masculism
Mass communication
Mass deacidification
Mass transfer
Mastery learning
Materials engineering
Materials physics
Materials science and engineering
Materiel
Mathematical biology
Mathematical chemistry
Mathematical economics
Mathematical logic
Mathematical optimization
Mathematical physics
Mathematical psychology
Mathematical sociology
Mathematical statistics
Mathematical system theory
Mathematics
Mathematics education
Matrix mechanics
Mayan history
Measure theory
Mechanical engineering
Mechanics
Mechanochemistry
Mechatronics
Media archaeology
Media psychology
Media studies (Mass media)
Medical anthropology
Medical cybernetics
Medical education
Medical physics
Medical psychology
Medical social work
Medical sociology
Medical toxicology
Medicinal chemistry
Medicine
Medieval
Medieval archaeology
Medieval literature
Medieval philosophy
Men in feminism
Men's liberation movement
Men's movement
Men's rights movement
Men's studies
Mental health
Mercantile law
Mercenary
Mesosociology
Meta-ethics
Meta-philosophy
Metaphysics
Meteorology
Mexican history
Micro-g environment research
Microbiology
Microbotics
Microeconomics
Microsociology
Microwave astronomy
Middle East studies
Military campaign
Military education and training
Military engineering
Military exercises
Military geography
Military history
Military intelligence
Military law
Military medicine
Military operation
Military policy
Military psychology
Military science
Military sciences
Military simulation
Military sociology
Military sports
Military weapons
Mineral physics
Mineralogy
Mining engineering
Misandry
Misogyny
Missiology
Mississippian culture
Mock combat
Modal logic
Model theory
Modern archaeology
Modern history
Modern language
Modern philosophy
Molecular anthropology
Molecular biology
Molecular dynamics
Molecular engineering
Molecular genetics
Molecular mechanics
Molecular pathology
Molecular physics
Molecular virology
Monetary economics
Monetary policy
Mongolian history
Moral psychology and Descriptive ethics
Moral psychology, Descriptive ethics, Value theory
Moral theology
Morale
Morphology
Multi-valued logic
Multilinear algebra
Multimedia, hypermedia
Multivariate analysis
Museology
Museum administration
Museum education
Music
Music archaeology
Music education
Music genre
Music history
Music psychology
Music theory
Music therapy
Musical composition
Musical theatre
Musicology
Mycology
Myriapodology
Myrmecology
Mysticism
Mythology
Mythology and Folklore