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Subject Areas (615)
- Aeronautics (14)
  - Aerodynamics (6)
    - Aerodynamics Characteristics (1)
    - Aerodynamics Of Bodies
    - Airfoil And Wing Aerodynamics
  - Aeronautics General (6)
  - Aircraft Communications And Navigations
  - Aircraft Design, Testing And Performance (1)
    - Auxiliary Electrical Systems (1)
    - Hydraulic And Pneumatic Systems
  - Aircraft Propulsion And Power (1)
    - Jet Propulsion (1)
  - Aircraft Stability And Control
  - Avionics And Aircraft Instrumentation
  - Research And Support Facilities (Air)
    - Wind Tunnels
  - Transportation And Safety
    - Aircraft Noise And Sonic Boom
    - Aircraft Safety And Safety Devices
    - Clear Air Turbulence
    - Commercial And General Aviation
    - Helicopters And Ground Effect Machines
    - Stol/Vtol Aircraft
    - Supersonic Transport
- Astronautics (181)
  - Astrodynamics (1)
  - Astrodynamics (3)
    - Celestial Mechanics And Orbital Calculations (3)
  - Astronautics (General) (13)
  - Ground Support Systems And Facilities (Space) (8)
    - Simulators And Simulation (3)
    - Spacecraft Ground Support (4)
    - Sterilization
    - Test Facilities (3)
  - Launch Vehicles And Launch Operations (24)
    - Launch Vehicles (21)
    - Reentry Vehicles (3)
    - Scientific Satellites
    - Sounding Rockets
    - Space Probes
    - U.S.S.R Spacecraft
  - Spacecraft Design, Testing And Performance (72)
    - Rendezvous And Docking
    - Space Stations (1)
    - Spacecraft Attitude Control And Stabilization (18)
  - Spacecraft Instrumentation And Astrionics (8)
    - Sensors And Transducers (1)
    - Spacecraft And Aircraft Instrumentation (7)
  - Spacecraft Propulsion And Power (54)
    - Auxiliary Propulsion (1)
    - Electric Propulsion
    - Rocket Engines, Nozzles And Thrust Chambers (17)
- Chemistry and Materials (93)
  - Chemistry and Materials (General) (19)
    - Chemical Analyis
    - Chemical Processes and Engineering
    - Luminescence
    - Photochemistry
  - Composite Materials (20)
    - Composite Materials (20)
    - Reinforced Materials and Fibers
  - Inorganic, Organic and Physical Chemistry (1)
    - Coatings
    - Corrosion
    - Electrochemistry (1)
    - Metal Crystals
  - Metals and Metallic Materials (21)
    - Aluminum (12)
    - Beryllium (1)
    - Liquid Metals (1)
    - Metallurgy (4)
    - Refractory Metals (1)
    - Steel (4)
    - Titanium
  - Non-Metallic Materials (8)
    - Adhesives (1)
    - Ceramics (1)
    - Elastomers
    - Graphite
    - Plastics
    - Polymers (6)
  - Propellants and Fuels (10)
    - Liquid Propellants (5)
    - Solid Propellants (5)
  - Space Processing (14)
- Engineering (121)
  - Communications and Radar (1)
    - Communication Equipment
    - Communication Satellites
    - Communication Systems (1)
    - Communication Theory
    - Radio Noise
    - Telemetry
  - Electronics and Electrical Engineering (10)
    - Amplifiers
    - Antennas
    - Circuitry (2)
    - Electrical Equipment (2)
    - Electromagnetic Radiation (2)
    - Electronic Components (5)
    - Feedback and Control Theory (1)
    - Magnetism
    - Microelectronics
    - Microwave and Submillimeter Wave Technology
    - RADAR Equipment (1)
    - Semi-Conductors and Transistors (1)
  - Engineering (General) (11)
  - Fluid Mechanics and Thermodynamics (13)
    - Ablation
    - Bondary Layer Technology
    - Combustion Physics (1)
    - Cryogenics
    - Fluid Flow (2)
    - Fluidics (1)
    - Gas Dynamics
    - Heat Transfer, Basic (5)
    - Reentry Heat Transfer (1)
    - Thermal Protection (3)
  - Instrumentation and Photography (13)
    - Data Recording (5)
    - Display Systems
    - Gas Flow Measurement
    - Infrared Technology
    - Instrument Standards and Calibration Techniques (3)
    - Photography (5)
    - Pressure Measurement
    - Temperature Measurement
  - Lasers and Masers
    - Laser Applications
    - Lasers and Masers
  - Mechanical Engineering (11)
    - Bearings and Gears (2)
    - Friction and Wear (1)
    - Lubrication and Lubricants
    - Machining (1)
    - Metal Forming (1)
    - Non-Destructive Testing (2)
    - Pumps (1)
    - Seals (1)
    - Turbomachinery
    - Vacuum Technology
    - Welding (2)
  - Quality Assurance and Reliability (2)
    - Quality Control and Reliability (2)
  - Structural Mechanics (61)
    - Impact Phenomena (1)
    - Sandwich Construction
    - Shells (5)
    - Stress Analysis (6)
    - Stresses and Loads (14)
    - Structural Fatigue (3)
    - Structural Tests and Reliability (24)
    - Structure Vibration and Damping (5)
- General (21)
- Geoscience (43)
  - Earth Resources and Remote Sensing (2)
    - Earth Resources (2)
    - Geodesy and Cartography
  - Energy Production and Conversion (9)
    - Energy Resources (2)
    - Fuel Cells and Chemical batteries (6)
    - Nuclear Auxillary Power
    - Solar Space Power (1)
  - Environment Pollution (2)
    - Environment Pollution Control (2)
  - Geophysics (10)
    - Geology and Seismology
    - Geomagnetism
    - Upper Earth Atmosphere (2)
  - Geosciences (General) (6)
  - Meteorological and Climatology (14)
    - Cloud Research (1)
    - Meteorological Instruments (2)
    - Meteorological Sattellites (1)
    - Micrometeorology
    - Weather Forecasting (11)
  - Oceanography
    - Water Resources and Oceanography
- Life Sciences (19)
  - Aerospace Medicines (1)
    - Aerospace Medicine (1)
    - Biological Radiation Effects
    - Clinical Medicine
    - Physiological Factors
  - Behavioral Sciences
  - Exobiology (1)
    - Extra-Terrestrial Life (1)
  - Life Sciences (General)
  - Man/Systems Technology and Life Support (17)
    - Bioinstrumentation (1)
    - Crew Safety and Protective Clothing (2)
    - Human Engineering
    - Life Support Systems (16)
    - Man Machine Systems
    - Robotics
  - Physiological Factors
- Mathmatical and Computer Sciences (15)
  - Computer Operations and Hardware (2)
    - Airborne or Spaceborne Computers (2)
    - Digital and Analog Computers
  - Computer Programming and Software (7)
    - CAD/CAM (2)
    - Computer Software (5)
  - Computer Systems
  - Cybernetics, Artificial Intelligence and Robotics (1)
    - Artificial Intelligence
    - Cybernetics and Bionics (1)
  - Mathmatical and Computer Sciences (General) (1)
    - Applied Mathmatics (1)
    - Data Processing
  - Numerical Analysis (3)
  - Numerical Analysis
  - Probability and Statistics (1)
    - Probability and Statistics (1)
  - Systems Analysis and Operations Research
  - Theoretical Mathmatics
- Physics (6)
  - Acoustics
    - Acoustics
    - Ultrasonics
  - Atomic and Molecular Physics (1)
    - Atomic Phyics (1)
    - Molecular Physics (1)
  - Nuclear Physics (1)
    - Nuclear Physics (1)
    - Radioactivity
  - Optics (1)
    - Light
    - Optics (1)
  - Physics (General) (2)
  - Physics of Elementary Particles and Fields
  - Solid State Pbysics (1)
    - Dialectrics
    - Epitaxial Deposition
    - Solid State Devices
    - Superconductivity (1)
- Social Sciences (7)
  - Administration and Management (1)
    - Aerospace Management (1)
  - Documentation and Information Science (4)
    - Information and Technology (4)
  - Economics and Cost Analysis
  - Law, Political Science and Space Policy
    - Space Commercialization
    - World Space Programs and Aerospace Law
  - Social and Information Sciences (General) (2)
  - Technology Utilizaton and Surface Transportation
    - Urban Technology and Transportation
- Space Communications, Spacecraft Communications,Command And Tracking (10)
  - Guidance Systems (1)
  - Navigation Systems (6)
  - Space Communications (2)
  - Tracking (2)
- Space Sciences (84)
  - Astronomy (5)
    - Meteors and Meteorites (3)
    - Solar Astronomy (2)
    - Stellar Astronomy and Cosmology
  - Astrophysics (5)
    - Astrophysical Plasmas
    - Gravitation
  - Lunar and Planetary Science and Exploration (14)
    - Planetary Science and Exploration (12)
    - The Moon (2)
  - Solar Physics (16)
  - Space Radiation (20)
    - Cosmic Radiation (4)
    - Radiation Belts (3)
    - Solar Radiation and Activity (7)
  - Space Sciences (General) (27)
- Space Transportation And Safety (14)
  - Space Transportation And Manned Spacecraft (14)