Subject Categories Facet

Subject Categories
. Aeronautics
. . Aerodynamics
. . Air Transportation and Safety
. . Aircraft Communications and Navigation
. . Aircraft Design, Testing and Performance
. . Aircraft Instrumentation
. . Aircraft Propulsion and Power
. . Aircraft Stability and Control
. . Research and Support Facilities (Air)
. Astronautics
. . Astrodynamics
. . Ground Support Systems and Facilities (Space)
. . Launch Vehicles and Space Vehicles
. . Space Communications, Spacecraft Communications, Command and Tracking
. . Space Transportation
. . Spacecraft Design, Testing and Performance
. . Spacecraft Instrumentation
. . Spacecraft Propulsion and Power
. Chemistry and Materials
. . Composite Materials
. . Inorganic and Physical Chemistry
. . Materials Processing in Space and Microgravity
. . Metallic Materials
. . Nonmetallic Materials
. . Propellants and Fuels
. Engineering
. . Communications and Radar
. . Electronics and Electrical Engineering
. . Fluid Mechanics and Heat Transfer
. . Instrumentation and Photography
. . Lasers and Masers
. . Mechanical Engineering
. . Quality Assurance and Reliability
. . Structural Mechanics
. General
. Geosciences
. . Earth Resources and Remote Sensing
. . Energy Production and Conversion
. . Environment Pollution
. . Geophysics
. . Meteorology and Climatology
. . Oceanography
. Life Sciences
. . Aerospace Medicine
. . Behavioral Sciences
. . Man/System Technology and Life Support
. . Space Biology
. Mathematical and Computer Sciences
. . Computer Operations and Hardware
. . Computer Programming and Software
. . Computer Systems
. . Cybernetics
. . Numerical Analysis
. . Statistics and Probability
. . Systems Analysis
. . Theoretical Mathematics
. Physics
. . Acoustics
. . Atomic and Molecular Physics
. . Nuclear and High-Energy Physics
. . Optics
. . Plasma Physics
. . Solid-State Physics
. . Thermodynamics and Statistical Physics
. Social Sciences
. . Administration and Management
. . Documentation and Information Science
. . Economics and Cost Analysis
. . Law, Political Science and Space Policy
. . Urban Technology and Transportation
. Space Sciences
. . Astronomy
. . Astrophysics
. . Lunar and Planetary Exploration
. . Solar Physics
. . Space Radiation