Page 64 of NTIS Database Search Guide by National Technical Information Service

ntis subject categories alphabetical listing with scope descriptions the ntis database search guide 64 84-space technology 840-general extraterrestial biology chemistry and medicine 84a-astronautics space missions projects and logistics orbital rendezvous space exploration spacecraft operating problems extravehicular activity 84b-extraterrestial exploration space probe exploration space landings space construction and maintenance extravehicular activity on other planets 84c-manned spacecraft design and construction of manned spacecraft space stations aerospace planes and their components 84d-spacecraft trajectories flight mechanics determination analysis processing of spacecraft trajectory data space mechanics orbital calculations flight path analysis atmosphere entry reentry dynamics 84e-space launch vehicles support equipment handling and launching including transportation storage preparation for launching countdown launching equipment checkout equipment ground support equipment and information systems spacecraft tracking systems tracking networks recovery support 84f-space safety safety measures and devices directed toward reducing the hazards of spaceflight 84g-unmanned spacecraft design and construction of unmanned spacecraft including space probes scientific satellites military satellites communication satellites reconnaissance satellites and navigational satellites for satellites applied to a specific application see the field of application 85e-pipeline transportation transportation of liquids gases and slurries through long-distance pipelines accidents and safety 85f-global navigation systems worldwide navigational aids to transportation global positioning system gps see also 76d 85g-marine waterway transportation shipping safety and accidents safety equipment cargo handling and equipment cargo movement passenger movement traffic control boating trade routes shipborne containerization see also 43g 74e 76 and 85d for marine engineering use 47a for waterway engineering use 50b 85h-road transportation passenger and cargo movement design and standards for vehicles and components motor vehicle engine studies safety engineering safety devices traffic and road safety collision research accident studies highway traffic traffic engineering passenger and cargo vehicles trailers motorcycles bicycles and bikeways hiking trails see also 43g 50a 74e 81j 85d and 91b 85i-railroad transportation safety and accidents safety equipment cargo handling and equipment cargo movement passenger movement traffic control terminals amtrak track studies rolling stock scheduling railroad engineering and equipment see also 43g 85d and 91b 91-urban regional technology development 910-general includes energy studies 91a-environmental management planning air water noise and waste management and control monitoring services solid wastes and recycling solid waste landfills water quality management environmental surveys design and operation of sewer systems combined etc water supplies and services excludes natural resource management see also 68 and 43f 91b-transportation traffic planning planning for modes of public and private passenger and cargo transporation travel patterns and demand parking traffic engineering traffic flow and control traffic surveys highway and street services rapid transit systems passenger transportation and planning pedestrian movement see also 43g and 85 91c-fire services law enforcement criminal justice fire police and court services and their administration law enforcement and criminal justice crime and fire prevention personnel recruitment training and utilization parole work release correctional institutions see also 43d for criminal justice and corrections see also 43gen 85-transportation 850-general 85a-air transportation operation of systems for transport by air civil aviation airports and airport access airline operations air routing air traffic control systems multimodal systems aviation safety and aviation accidents aircraft fires aircraft fuel fires see also 43g 74e 76 85d and 91b for design of aircraft and components use 51 and 81 for runway construction and design use 50b 85c-metropolitan rail transportation urban rail transit underground and above-ground rapid transit railways including subways automated guideway transit systems tracked air cushion vehicles see also 85i and 91b 85d-transportation safety safety and accidents involving air land and water transportation accident studies and prevention alcohol related studies breakaway barriers and structures standards and testing of components and equipment crashworthiness traffic safety collision research safety equipment and devices see also 91b for pipeline accidents use 85e 64

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