NASA Scientific and Technical Information (STI) Program
Collect, organize, provide access, and preserve NASA's research and development published results
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Link to Subject Category
packaging - 37
packing (machine elements) - 37
packing (metallic materials) - 26
packing (nonmetallic materials) - 27
paints - 27
panels (structures) - 39
paper - 27
parachute aerodynamics - 02
parachutes (personal and aircraft applications) - 03
parachutes (spacecraft applications) - 16
parallel processing (hardware) - 60
parallel processing - 62
parametric amplifiers - 36
parentology - 67
particle physics - 77
passenger air transport operations - 03
passenger handling (air transportation) - 03
passenger handling (space transportation) - 16
passenger transportation (air) - 03
passenger transportation (space) - 16
passive communication satellites - 18
passive satellite stabilization - 18
passive sensors, trackers, and references (aircraft) - 04
passive sensors, trackers, and references (spacecraft) - 19
patching compounds - 27
patent law - 84
patent policy - 84
pathology (human) - 52
pattern recognition - 63
Payload Assist Module (PAM) assist - 16
payload delivery (space transportation) - 16
payload handling (space transportation) - 16
payload operations and support - 14
payload retrieval (space transportation) - 16
perception (biological, human) - 52
perception (psychological, human) - 53
personal computers - 60
PERT (Program Evaluation and Review Technique) - 81
perturbation theory (mathematics) - 64
petrography - 42
petroleum deposits - 43
petrology - 42
pharmaceutical preparation (space processing) - 29
pharmacology - 52
phase equilibrium - 26
phase shift keying (PSK) - 32
phased array radar - 32
photochemistry - 25
photoelasticity - 39
photoelectric devices - 33
photogrammetry - 43
photographic processing equipment - 35
photographic supplies - 35
photography - 35
photometry - 35
photomultipliers - 33
photon beams - 74
photon interactions with atoms and molecules - 72
photonics - 74
photosphere (solar) - 92
phototheodolites - 35
photovoltaic energy conversion devices - 44
physical chemistry - 25
physical oceanography - 48
physical properties of alloys - 26
physical properties of celestial bodies - 90
physical properties of metals - 26
physical properties of nonmetallic materials - 27
physical properties of propellants and fuels - 28
physics - 70
physiological effects of flight (human) - 52
physiological factors (human) - 52
physiological monitoring devices (human) - 52
physiological monitoring devices (theory and techniques) - 35
physiology (human) - 52
phytoplankton concentration - 48
piezoelectricity - 76
pilot performance - 53
pilot support systems (aircraft) - 06
piloting (spacecraft) - 18
pions - 77
piston engine fuels - 28
piston engines (aircraft) - 07
piston engines (non-aircraft) - 37
pitch control (aircraft) - 08
pitch control (spacecraft) - 18
pitch stability (aircraft) - 08
pitch stability (spacecraft) - 18
planet location - 89
planetary atmospheres - 91
planetary biology - 55
planetary evolution - 91
planetary exploration - 91
planetary landers - 18
planetary mapping - 91
planetary motion - 91
planetary orbiters - 18
planetary photography - 91
planetary probes - 18
planetary roving vehicles - 14
planetary samples - 91
planetary satellites (characteristics and composition) - 91
planetary structure - 91
planetology - 91
plants - 51
plasma conductivity - 75
plasma diagnostics - 75
plasma dynamics - 75
plasma flow - 75
plasma fusion - 75
plasma oscillations - 75
plasma physics research equipment - 75
plasma physics - 75
plasma pinch - 75
plasma propulsion (spacecraft applications) - 20
plasma propulsion (theory) - 75
plasma seeding - 75
plasma sheath - 75
plasma spraying - 37
plasma theory - 75
plasma wakes (spacecraft) - 18
plasma waves - 75
plasticity - 39
plastics - 27
plate tectonics - 46
plates (structural elements) - 39
plating - 37
plotters - 60
plywoods - 27
pneumatic systems (aircraft propulsion and power) - 07
pneumatic systems (aircraft) - 05
pneumatic systems (general) - 37
pneumatic systems (spacecraft propulsion and power) - 20
pneumatic systems (spacecraft) - 18
pneumatics - 34
pointing systems - 19
polarization (optics) - 74
polarography (application) - 25
political science - 84
pollution control - 45
pollution monitoring - 45
polymer matrix composites - 24
polymers (space processing) - 29
polymers - 27
position indicators (aircraft) - 06
position indicators (spacecraft) - 19
position sensors - 35
powder metallurgy - 26
power amplifiers - 33
power packs (electric) - 33
power plant instruments and gages (aircraft) - 06
power supplies electric) - 33
powered trajectories - 13
powerlift technology - 05
powertrains - 37
precipitation (meteorology) - 47
precision time and time interval (PTTI) - 35
prediction analysis - 65
pressure test facilities (aircraft) - 09
pressure test facilities (space) - 14
pressure transducers - 35
pressure vessels - 37
pressurization systems (aircraft) - 05
pressurization systems (spacecraft) - 18
pressurized cabins (life support) - 54
pressurized cabins (spacecraft) - 18
pressurized cabins - 05
principal components analysis - 65
printed circuits - 33
probability density functions - 65
probability - 65
processors (hardware) - 60
production costs - 83
production forecasts - 83
program management - 81
programmable logic devices - 33
programming (computers) - 61
programming languages - 61
project documentation - 82
project management - 81
projectile trajectories - 13
propellant flow systems (spacecraft) - 20
propellant grains - 28
propellant injectors, pumps, and tanks (spacecraft) - 20
propellant storage - 28
propellants - 28
propeller aerodynamics - 02
propellers (tractor, pusher, contrarotating, propfan) - 07
propulsion effects on launching, trajectories, and orbits - 13
propulsion system components (aircraft) - 07
propulsion system components (spacecraft) - 20
propulsion system instruments and gages (aircraft) - 06
propulsion system instruments and gages (spacecraft) - 19
propulsion systems (aircraft) - 07
propulsion systems (spacecraft) - 20
protection measures (human) - 54
protection of alloys - 26
protection of materials (metallic) - 26
protection of materials (nonmetallic) - 27
protective clothing - 54
protective coatings (metallic materials) - 26
protective coatings (nonmetallic) - 27
protobiological evolution - 55
protocol checking - 61
proton beams (nuclear interactions) - 73
psychological effects of flight - 53
psychological factors - 53
public nuisance implications - 03
pulsars (astrophysics) - 90
pulsars (observation) - 89
pulse detonation engines - 07
pulsed plasma thrusters - 20
pulsejet engines - 07
pumps (aircraft engines and fuel systems) - 07
pumps (non-aircraft) - 37
pumps (spacecraft) - 20
pyrolysis - 25
pyrotechnics - 28
