NASA Taxonomy

  1. MA USE Mission Assurance
  2. Mach meters USE Avionics and Aircraft Instrumentation
  3. machine elements USE Mechanical Engineering
  4. machine learning USE Cybernetics, Artificial Intelligence and Robotics
  5. machine processes USE Mechanical Engineering
  6. machinery USE Mechanical Engineering
  7. machining USE Mechanical Engineering
  8. macrometeorology USE Meteorology and Climatology
  9. Macromolecular Biotechnology
  10. macromolecular crystallography (space processing) USE Space Processing
  11. Mag Constellation
  12. Mag Multiscale
  13. Magellan
  14. Magellanic clouds USE Astrophysics
  15. maglev vehicles USE Technology Utilization and Surface Transportation
  16. magnetic field effects USE Exobiology
  17. magnetic field effects (biological, animal and plant) USE Life Sciences (General)
  18. magnetic field effects (human) USE Aerospace Medicine
  19. magnetic sails USE Spacecraft Propulsion and Power
  20. magnetism USE Physics (General)
  21. magnetism (extraterrestrial) USE Astrophysics
  22. magnetism (terrestrial) USE Geophysics
  23. magnetogasdynamics USE Plasma Physics
  24. magnetohydrodynamic (MHD) energy conversion device USE Energy Production and Conversion
  25. magnetohydrodynamic (MHO) power sources USE Spacecraft Propulsion and Power
  26. magnetohydrodynamic (MHO) thrusters USE Spacecraft Propulsion and Power
  27. magnetohydrodynamics USE Plasma Physics
  28. magnetoplasmas USE Plasma Physics
  29. magnetosphere (Earth) USE Geophysics
  30. magnets (electrical, electronics application) USE Electronics and Electrical Engineering
  31. main propulsion system components (spacecraft) USE Spacecraft Propulsion and Power
  32. main propulsion systems (spacecraft) USE Spacecraft Propulsion and Power
  33. mainframes USE Computer Operations and Hardware
  34. maintainability (procedures and theory) USE Quality Assurance and Reliability
  35. Maintenance
  36. maintenance (aircraft) USE Aeronautics (General)
  37. maintenance (spacecraft) USE Astronautics (General)
  38. maintenance facilities (aircraft) USE Research and Support Facilities (Air)
  39. maintenance facilities (space based, ground based) USE Ground Support Systems and Facilities (Space)
  40. man-machine communications (aircraft) USE Aircraft Communications and Navigation
  41. man-machine communications (spacecraft) USE Space Communications, Spacecraft Communications, Command and Tracking
  42. man-machine communications (theory and techniques) USE Communications and Radar
  43. man-machine systems USE Man/System Technology and Life Support
  44. man-system interfaces USE Man/System Technology and Life Support
  45. Man/System Technology and Life Support
  46. management USE Administration and Management
  47. Management & Policy Division
  48. Management and coordinated activities
  49. Management and Technical Support Office
  50. Management Competency Suite
  51. Management Information Systems
  52. Management Operations Directorate
  53. management planning USE Administration and Management
  54. management research USE Administration and Management
  55. management tools USE Administration and Management
  56. Managers
  57. Managers (Internal)
  58. Maneuver analysis
  59. maneuvering (aircraft) USE Aircraft Stability and Control
  60. maneuvering (spacecraft) USE Spacecraft Design, Testing and Performance
  61. manned flights (space exploration) USE Lunar and Planetary Science and Exploration
  62. manned lunar exploration USE Lunar and Planetary Science and Exploration
  63. manned maneuvering units USE Man/System Technology and Life Support
  64. manned Mars missions USE Lunar and Planetary Science and Exploration
  65. manned orbital laboratories USE Spacecraft Design, Testing and Performance
  66. manned planetary exploration USE Lunar and Planetary Science and Exploration
  67. manned space flight network USE Space Communications, Spacecraft Communications, Command and Tracking
  68. manned spacecraft USE Spacecraft Design, Testing and Performance
  69. ManTech International Corporation
  70. Manual Control Fundamental Research
  71. Manuals
  72. manuals (refer to appropriate category for manuals) USE Documentation and Information Science
  73. MANUFACT USE Manufacturing Engineering
  74. manufacture of propellants USE Propellants and Fuels
  75. Manufacturing Engineering
  76. manufacturing processes USE Mechanical Engineering
  77. many-body problems USE Physics (General)
  78. MAP USE Mission Analysis and Planning
  79. mapping USE Earth Resources and Remote Sensing
  80. Maps
  81. marine biology USE Oceanography
  82. marine resources USE Oceanography
  83. Mariner 1
  84. Mariner 10
  85. Mariner 2
  86. Mariner 3
  87. Mariner 4
  88. Mariner 5
  89. Mariner 6
  90. Mariner 7
  91. Mariner 8
  92. Mariner 9
  93. Mariner Missions
  94. marketing predictions USE Economics and Cost Analysis
  95. marketing research USE Economics and Cost Analysis
  96. Markov processes USE Statistics and Probability
  97. Mars
  98. Mars 2003 Rovers USE Mars Exploration Rovers
  99. Mars 2007+
  100. Mars 96
  101. Mars Climate Orbiter
  102. Mars exploration USE Lunar and Planetary Science and Exploration
  103. Mars Exploration
  104. Mars Exploration Rover Mission
  105. Mars Exploration Rovers
  106. Mars Express
  107. Mars Global Surveyor
  108. Mars Global Surveyor
  109. Mars Instruments Office
  110. Mars Network Project Office
  111. Mars Observer
  112. Mars Odyssey
  113. Mars Pathfinder
  114. Mars Polar Lander
  115. Mars Reconnaissance Orbiter
  116. Mars Reconnaissance Orbiter
  117. Mars Science Lab
  118. Mars Science Laboratory
  119. Mars Surveyor 2003
  120. Mars Surveyor 2005
  121. Marshall Space Flight Center USE George C. Marshall Space Flight Center
  122. MARSIS Project Office
  123. martingales USE Statistics and Probability
  124. masers USE Lasers and Masers
  125. mass spectrometers USE Instrumentation and Photography
  126. Mass Spectrometers
  127. mass spectroscopy (application) USE Inorganic, Organic and Physical Chemistry
  128. mass transfer USE Fluid Mechanics and Thermodynamics
  129. mass transportation USE Technology Utilization and Surface Transportation
  130. Massachusetts Institute of Technology
  131. Master Planning
  132. MASTERPLAN USE Master Planning
  133. materials (general) USE Chemistry and Materials (General)
  134. materials fabrication USE Mechanical Engineering
  135. materials forming USE Mechanical Engineering
  136. materials handling USE Mechanical Engineering
  137. Materials Integration Engineering
  138. materials manufacturing USE Mechanical Engineering
  139. materials processing in space USE Space Processing
  140. Materials Science and Engineering
  141. Materials Sciences
  142. materials separation in space USE Space Processing
  143. Materials Test Engineering
  144. mathematical analysis USE Numerical Analysis
  145. Mathematical and Computer Sciences
  146. Mathematical and Computer Sciences (General)
  147. mathematical logic USE Theoretical Mathematics
  148. Mathematical Modeling & Analysis
  149. mathematical modeling (systems analysis) USE Systems Analysis and Operations Research
  150. Mathematical Models
  151. mathematical programming USE Systems Analysis and Operations Research
  152. mathematical sciences (general) USE Mathematical and Computer Sciences (General)
  153. mathematical theories USE Theoretical Mathematics
  154. Mathilde USE 253 Mathilde
  155. matrices USE Numerical Analysis
  156. MATSCIENG USE Materials Science and Engineering
  157. maximum likelihood estimation USE Statistics and Probability
  158. MDBEHAVIOR USE Behavioral Health
  159. MDPRACTICE USE Medical Practice
  160. measuring instruments USE Instrumentation and Photography
  161. Mechanical
  162. mechanical computers USE Computer Operations and Hardware
  163. mechanical drawing USE Documentation and Information Science
  164. Mechanical Engineering
  165. mechanical equipment USE Mechanical Engineering
  166. mechanical properties (composite materials) USE Composite Materials
  167. mechanical properties of alloys USE Metals and Metallic Materials
  168. mechanical properties of metals USE Metals and Metallic Materials
  169. mechanical properties of nonmetallic materials USE Nonmetallic Materials
  170. mechanical properties of propellants and fuels USE Propellants and Fuels
  171. Mechanical Systems
  172. Mechanical Systems
  173. mechanics (practical) USE Mechanical Engineering
  174. mechanics (theory and analysis) USE Physics (General)
  175. Mechanics and Durability
  176. MECHDUR USE Mechanics and Durability
  177. MECHSYS USE Mechanical Systems
  178. Media
  179. Media support
  180. Medical Practice
  181. Meeting Documents
  182. Meeting Notes USE Minutes
  183. Memoranda USE Memos
  184. Memoranda of Agreement USE Agreements
  185. Memoranda of Understanding USE Agreements
  186. memory devices (computer) USE Computer Operations and Hardware
  187. Memos
  188. mental adaptation to flight USE Behavioral Sciences
  189. Mercury
  190. Mercury USE Mercury Missions
  191. Mercury Atlas 6
  192. Mercury Atlas 7
  193. Mercury Atlas 8
  194. Mercury Atlas 9
  195. Mercury Missions
  196. Mercury Orbiter USE Mercury Surface Space Environment, Geochemistry, and Ranging
  197. Mercury Redstone 3
  198. Mercury Redstone 4
  199. Mercury Surface Space Environment, Geochemistry, and Ranging
  200. mesh refinement (mathematics) USE Numerical Analysis