Space Transportation cargo space transportation passenger space transportation space rescue space shuttle Includes passenger and cargo space transportation, e.g., shuttle operations; and space rescue techniques. For related information see also Air Transportation and Safety and Spacecraft Design, Testing and Performance. For space suits see Man/System Technology and Life Support. 43 Cybernetics artificial intelligence control theory expert systems feedback theory robotics Includes feedback and control theory, artificial intelligence, robotics and expert systems. For related information see also Man/System Technology and Life Support. 67 Environment Pollution air pollution noise pollution pollution thermal pollution water pollution Includes atmospheric, noise, thermal, and water pollution. 8 Social Sciences Includes educational matters. Includes social sciences (general); administration and management; documentation and information science; economics and cost analysis; law, political science, and space policy; and urban technology and transportation. 14 Spacecraft Design, Testing and Performance attitude controls environmental controls satellites space platforms space stations spacecraft systems thermal controls Includes satellites; space platforms; space stations; spacecraft systems and components such as thermal and environmental controls; and attitude controls. For related information see also Aircraft Design, Testing and Performance and Structural Mechanics. For life support systems see Man/System Technology and Life Support. 47 Energy Production and Conversion energy conversion systems fuel cells geophysical conversion windpower Includes specific energy conversion systems, e.g., fuel cells; global sources of energy; geophysical conversion; and windpower. For related information see also Aircraft Propulsion and Power, Spacecraft Propulsion and Power, and Propellants and Fuels. 57 Astronomy astrometry gamma-ray astronomy infrared astronomy radio astronomy Includes radio, gamma-ray, and infrared astronomy; and astrometry. 74 Fluid Mechanics and Heat Transfer ablation cooling boundary layers fluidics hydrodynamics mass transfer Includes boundary layers; hydrodynamics; fluidics; mass transfer and ablation cooling. For related information see also Aerodynamics and Thermodynamics and Statistical Physics. 2 Engineering control engineering cryogenics display engineering fire prevention vacuum technology Includes vacuum technology; control engineering; display engineering and cryogenics; and fire prevention. Includes engineering (general); communications and radar; electronics and electrical engineering; fluid mechanics and heat transfer; instrumentation and photography; lasers and masers; mechanical engineering; quality assurance and reliability; and structural mechanics. For related information see also Physics. 127 Space Communications, Spacecraft Communications, Command and astronavigation and guidance radio blackout space communications networks telemetry Includes telemetry; space communications networks; astronavigation and guidance; and radio blackout. For related information see also Aircraft Communications and Navigation andCommunications and Radar. 45 Research and Support Facilities (Air) air research and support facilities aircraft engine test stands aircraft repair facilities airports hangars runways shock tubes wind tunnels Includes airports, hangars and runways; aircraft repair and overhaul facilities; wind tunnels; shock tubes and aircraft engine test stands. For related information see also Ground Support Systems and Facilities (Space). 26 Space Sciences Includes space sciences (general); astronomy; astrophysics; lunar and planetary exploration; solar physics; and space radiation. For related information see also Geosciences. 83 Life Sciences Includes life sciences (general); aerospace medicine; behavioral sciences; man/system technology and life support; and space biology. 33 Plasma Physics magnetohydrodynamics plasma fusion Includes magnetohydrodynamics and plasma fusion. For ionospheric plasmas see Geophysics. For space plasmas see Astrophysics. 90 Economics and Cost Analysis cost effectiveness studies Includes cost effectiveness studies. 141 Chemistry and Materials Includes chemistry and materials (general); composite materials; inorganic and physical chemistry; metallic materials; nonmetallic materials; propellants and fuels; and materials processing. 116 Solar Physics solar activity solar flares solar radiation sunspots Includes solar activity, solar flares, solar radiation and sunspots. For related information see also Space Radiation. 258 Spacecraft Propulsion and Power propulsion systems rocket engines spacecraft power sources Includes main propulsion systems and components, e.g., rocket engines; and spacecraft auxiliary power sources. For related information see also Aircraft Propulsion and Power, Propellants and Fuels, Energy Production and Conversion, and Launch Vehicles and Space Vehicles. 58 Documentation and Information Science graphic arts information management information storage and retrieval technology micrography technical writing Includes information management; information storage and retrieval technology; technical writing; graphic arts; and micrography. For computer documentation see Computer Programming and Software. 135 Communications and Radar communications theory global communications land communications optical communications radar Includes radar; land and global communications; communications theory; and optical communications. For related information see also Aircraft Communications and Navigation and Space Communications, Spacecraft Communications, Command and Tracking. For search and rescue see Air Transportation and Safety and Space Transportation. 42 Numerical Analysis difference equations iteration numerical approximation Includes iteration, difference equations, and numerical approximation. 151 Launch Vehicles and Space Vehicles boosters reusable vehicles Includes boosters; operating problems of launch/space vehicle systems; and reusable vehicles. For related information see also Spacecraft Propulsion and Power. 77 Optics light optical devices Includes light phenomena and optical devices. For lasers see Lasers and Masers. 221 Materials Processing in Space and Microgravity Includes space-based development of products and processes for commercial application. For biological materials see Space Biology. 118 Urban Technology and Transportation mass transportation surface transportation technology assessment technology transfer Includes applications of space technology to urban problems; technology transfer; technology assessment; and surface and mass transportation. For related information see Air Transportation and Safety, Space Transportation, and Energy Production and Conversion. 44 Metallic Materials corrosion metallurgy Includes physical, chemical, and mechanical properties of metals, e.g., corrosion; and metallurgy. 119 Computer Systems computer networks Includes computer networks and special application computer systems. 130 Oceanography marine resources Includes biological, dynamic, and physical oceanography; and marine resources. For related information see also Earth Resources and Remote Sensing. 161 Mechanical Engineering machine elements machine processes mechanical equipment Includes auxiliary systems (nonpower); machine elements and processes; and mechanical equipment. 180 Aircraft Communications and Navigation air navigation systems air traffic control Includes digital and voice communication with aircraft; air navigation systems (satellite and ground based); and air traffic control. For related information see also Space Communications, Spacecraft Communications, Command and Tracking and Communications and Radar. 21 Acoustics attenuation sound generation sound transmission Includes sound generation, transmission, and attenuation. For noise pollution see Environment Pollution. 3 Instrumentation and Photography cameras detectors gauges holography measuring instruments photographic supplies remote sensors Includes remote sensors; measuring instruments and gages; detectors; cameras and photographic supplies; and holography. For related information see also Aircraft Instrumentation and Spacecraft Instrumentation.For aerial photography see Earth Resources and Remote Sensing. 55 Quality Assurance and Reliability product sampling quality control Includes product sampling procedures and techniques; and quality control. 181 Aircraft Propulsion and Power Includes prime propulsion systems and systems components, e.g., gas turbine engines and compressors; and on-board auxiliary power plants for aircraft. For related information see also Spacecraft Propulsion and Power, Propellants and Fuels, and Energy Production and Conversion. 24 Lasers and Masers parametric amplifiers Includes parametric amplifiers. For related information see also Solid-State Physics. 179 Space Radiation cosmic radiation earth radiation belts Includes cosmic radiation; and inner and outer earth's radiation belts. For biological effects of radiation see Aerospace Medicine. For theory see Nuclear and High-Energy Physics. 34 Structural Mechanics fatigue structural element design thermal stress weight analysis Includes structural element design and weight analysis; fatigue; and thermal stress. For applications see Aircraft Design, Testing and Performanceand Spacecraft Design, Testing and Performance. 48 Nuclear and High-Energy Physics elementary particles nuclear particles reactor theory Includes elementary and nuclear particles; and reactor theory. For space radiation see Space Radiation. 172 Astronautics Includes astronautics (general); astrodynamics; ground support systems and facilities (space); launch vehicles and space vehicles; space transportation; space communications, spacecraft communications, command and tracking; spacecraft design, testing and performance; spacecraft instrumentation; and spacecraft propulsion and power. For related information see also Aeronautics. For extraterrestrial exploration see Lunar and Planetary Exploration. 27 Propellants and Fuels aircraft fuels igniters oxidizers rocket propellants Includes rocket propellants, igniters and oxidizers; their storage and handling procedures; and aircraft fuels. For related information see also Aircraft Propulsion and Power, Spacecraft Propulsion and Power, and Energy Production and Conversion. 51 Aerodynamics Includes aerodynamics of bodies, combinations, wings, rotors, and control surfaces; and internal flow in ducts and turbomachinery. For related information see also Fluid Mechanics and Heat Transfer. 17 Air Transportation and Safety aircraft accidents cargo air transport passenger air transport Includes passenger and cargo air transport operations; and aircraft accidents. For related information see also Space Transportation and Urban Technology and Transportation. 20 Geophysics aeronomy geomagnetism ionospheric physics lower atmosphere studies magnetospheric physics upper atmosphere studies Includes aeronomy; upper and lower atmosphere studies; ionospheric and magnetospheric physics; and geomagnetism. For space radiation see Space Radiation. 29 Inorganic and Physical Chemistry chemical analysis chromatography combustion theory electrochemistry photochemistry Includes chemical analysis, e.g., chromatography; combustion theory; electrochemistry; and photochemistry. For related information see also Thermodynamics and Statistical Physics. 115 Thermodynamics and Statistical Physics Bose statistics Fermi statistics quantum mechanics theoretical physics Includes quantum mechanics; theoretical physics; and Bose and Fermi statistics. For related information see also Inorganic and Physical Chemistry and Fluid Mechanics and Heat Transfer. 108 Computer Programming and Software algorithms CAD/CAM computer programs Includes computer programs, routines, algorithms, and specific applications, e.g., CAD/CAM. 65 Spacecraft Instrumentation For related information see also Aircraft Instrumentation and Instrumentation and Photography. 56 Ground Support Systems and Facilities (Space) 76 Behavioral Sciences crew evaluation crew training psychiatric research Includes psychological factors; individual and group behavior; crew training and evaluation; and psychiatric research. 98 Nonmetallic Materials adhesives ceramic materials elastomers lubricants plastic polymers textiles Includes physical, chemical, and mechanical properties of plastic, elastomers, lubricants, polymers, textiles, adhesives, and ceramic materials. For composite materials see Composite Materials. 10 Aircraft Instrumentation cabin display devices cockpit display devices flight instruments Includes cockpit and cabin display devices; and flight instruments. For related information see also Spacecraft Instrumentation and Instrumentation and Photography. 23 Subject Categories 19 General biographies histories overviews Includes aeronautical, astronautical, and space science related histories, biographies, and pertinent reports too broad for categorization; histories or broad overviews of NASA programs. 103 Solid-State Physics superconductivity Includes superconductivity. For related information see also Electronics and Electrical Engineering and Lasers and Masers. 170 Aircraft Design, Testing and Performance aircraft simulations Includes aircraft simulations technology. For related information see also Spacecraft Design, Testing and Performance and Structural Mechanics. For land transportation vehicles see Urban Technology and Transportation. 22 Aerospace Medicine radiation effects weightlessness effects Includes physiological factors; biological effects of radiation; and effects of weightlessness on man and animals. 30 Geosciences Includes geosciences (general); earth resources and remote sensing; energy production and conversion; environment pollution; geophysics; meteorology and climatology; and oceanography. For related information see also Space Sciences. 160 Theoretical Mathematics number theory topology Includes topology and number theory. 239 Astrophysics celestial mechanics cosmology interplanetary gases and dust interstellar gases and dust space plasmas Includes cosmology; celestial mechanics; space plasmas; and interstellar and interplanetary gases and dust. For related information see also Plasma Physics. 84 Man/System Technology and Life Support biotechnology human engineering protective clothing space suits Includes human engineering; biotechnology; and space suits and protective clothing. For related information see also Space Transportation. 105 Physics Includes physics (general); acoustics; atomic and molecular physics; nuclear and high-energy physics; optics; plasma physics; solid-state physics; and thermodynamics and statistical physics. For related information see also Engineering. For precision time and time interval (PTTI) see Instrumentation and Photography. For geophysics, astrophysics or solar physics see Geophysics, Astrophysics, or Solar Physics. 7 Earth Resources and Remote Sensing aerial photography photogrammetry Includes remote sensing of earth resources by aircraft and spacecraft; photogrammetry; and aerial photography. For instrumentation see Instrumentation and Photography. 16 Astrodynamics free-flight trajectories launching dynamics orbital dynamics powered trajectories Includes powered and free-flight trajectories; and orbital and launching dynamics. 68 Aircraft Stability and Control autopilots flight controls piloting Includes aircraft handling qualities; piloting; flight controls; and autopilots. For related information see also Aircraft Design, Testing and Performance. 25 Meteorology and Climatology weather forecasting weather modification Includes weather forecasting and modification. 203 Statics and Probability data sampling data smoothing Monte Carlo method stochastic processes Includes data sampling and smoothing; Monte Carlo method; and stochastic processes. 147 Mathematical and Computer Sciences Includes mathematical and computer sciences (general); computer operations and hardware; computer programming and software; computer systems; cybernetics; numerical analysis; statistics and probability; systems analysis; and theoretical mathematics. 132 Electronics and Electrical Engineering electronic components integrated circuitry microminiaturization test equipment transistors tunnel diodes Includes test equipment and maintainability; components, e.g., tunnel diodes and transistors; microminiaturization; and integrated circuitry. For related information see also Computer Operations and Hardware and Solid-State Physics. 133 Aeronautics Includes aeronautics (general); aerodynamics; air transportation and safety; aircraft communications and navigation; aircraft design, testing and performance; aircraft instrumentation; aircraft propulsion and power; aircraft stability and control; and research and support facilities (air). For related information see also Astronautics. 18 Space Biology exobiology extraterrestrial life planetary biology Includes exobiology; planetary biology; and extraterrestrial life. 188 Law, Political Science and Space Policy aviation law international cooperation international law patent policy space law space policy Includes NASA appropriation hearings; aviation law; space law and policy; international law; international cooperation; and patent policy. 97 Atomic and Molecular Physics atomic structure electron properties molecular spectra Includes atomic structure, electron properties, and molecular spectra. 91 Administration and Management management planning management research Includes management planning and research. 11 Systems Analysis mathematical modeling network analysis operations research Includes mathematical modeling; network analysis; and operations research. 238 Composite Materials laminates Includes physical, chemical, and mechanical properties of laminates and other composite materials. For ceramic materials see Nonmetallic Materials. 117 Computer Operations and Hardware Includes hardware for computer graphics, firmware, and data processing. For components see Electronics and Electrical Engineering. 131 Lunar and Planetary Exploration manned flights planetology unmanned flights Includes planetology; and manned and unmanned flights. For spacecraft design or space stations see Spacecraft Design, Testing and Performance. 78