| 3AAL | Three-Axis Acoustic Levitator |
| 3M | Minnesota Mining and Manufacturing Company |
| A | Ampere |
| A&R | Automation and Robotics |
| AADSF | Advanced Automated Directional Solidification Furnace |
| AAL | Aero-acoustic Levitation |
| AC&S | Altitude Control and Stabilization |
| ACA | Attitude Control Assembly |
| ACC | Aft Cargo Carrier |
| ACCG | American Conferences of Crystal Growers |
| ACES | Acoustic Containerless Experiment System |
| ACPF | Acoustic Containerless Processing Facility |
| ACRT | Accelerated Crucible Rotation Technique |
| ACS | Attitude Control System |
| ADA | Advanced Development Activity |
| ADA | DOD High-Level Programming Language |
| ADH | Advanced Development Hardware |
| ADP | Acceptance Data Package |
| ADP | Advanced Development Program |
| ADSF | Automated Directional Solidification Furnace |
| AEO | Assurance Engineering Office |
| AFD | Aft Flight Deck |
| AFEQ | Adiabatic Fast Equilibration |
| AFT | Advanced Furnace Technology |
| AIAA | American Institute of Aeronautics and Astronautics |
| ALF | Acoustic Levitator Furnace |
| ALU | Advanced Levitation Unit |
| AME | Acceleration Monitoring Experiment |
| AMO | Assurance Management Office |
| AO | Announcement of Opportunity |
| AOMS | Advanced Optical Monitoring Systems |
| APCF | Advanced Protein Crystallization Facility |
| APCG | Advanced Protein Crystal Growth |
| APCGF | Advanced Protein Crystal Growth Facility |
| APM | Attached Payload Module |
| AR | Acceptance Review |
| ARC | Aggregation of Red Blood Cells (Australia) |
| ARC | Ames Research Center |
| ARF | Animal Research Facility |
| ASCG | Automatic Solution Crystal Growth |
| ASCO | Specific Change Order |
| ASTP | Apollo-Soyuz Test Project |
| ATAC | Advanced Technology Advisory Committee |
| ATCS | Active Thermal Control Subsystem |
| ATD | Advanced Technology Development |
| ATE | Automatic Test Equipment |
| ATP | Authority to Proceed |
| AUE | Alloy Undercooling Experiment |
| AVCG | Automatic Vapor Crystal Growth |
| B/L | Baseline |
| BASE | Binary Alloy Solidification Experiment |
| BASG | Ball Aerospace Group |
| BBU | Bubble Behavior Unit (Japan) |
| BCL | Battelle Columbus Laboratories |
| BDPU | " Bubble, Drop and Particle Unit" |
| BF | Biotechnology Facility |
| BI0 | Space Bioreactor |
| BiSn | Bismuth-Tin Crystal Growth |
| BIU | Bus Interface Unit |
| BRE | Blood Rheology Equipment |
| BTF | Biotechnology Facility |
| BTS | Biotelemetry System |
| C | Celsius |
| C&T | Communications and Tracking |
| C/C | Carrier/Container |
| C/O | Checkout |
| CAD | Computer-Aided Design |
| CADAP | Computer-Aided Dendrite Analysis Program |
| CAE | Computer-Aided Engineering |
| CAG | Commercial Advocacy Group |
| CAM | Computer-Aided Manufacturing |
| CAP | Crew Activity Plan |
| CAP | Customer Accommodation Plan |
| CAST | Casting and Solidification Technology |
| CBE | Chemical Beam Epitaxy |
| CCB | Change Control Board |
| CCB | Configuration Control Board |
| CCD | Charge-coupled Device |
| CCDS | Centers for the Commercial Development of Space |
| CCTV | Closed Circuit Television |
| CDG | Concept Development Group |
| CDMS | Command and Data Management System |
| CDOT | Colloidal Disorder-Order Transitions |
| CDR | Critical Design Review |
| CDSF | Commercially Developed Space Facility |
| CEI SPEC | Contract End Item Specification |
| CELS | Controlled Environment and Life Support System |
| CELSS | Controlled Environment and Life Support System |
| CER | Cost Estimate Relationships |
| CET | Combined Environmental Test |
| CF | Constant Flux |
| CFES | Continuous Flow Electrophoresis System |
| CFIF | Continuous Flow Isoelectric Focusing |
| CFLSE | Critical Fluid Light Scattering Experiment |
| CFM | Candle Flames in Microgravity |
| CFTE | Critical Fluid Thermal Equilibration Experiment |
| CFVME | Critical Fluid Viscosity Measurement Experiment |
| CGF | Crystal Growth Furnace |
| CHF | Continuous Heating Furnace (Japan) |
| CI | Customer lntegration |
| CI0 | Customer Integration Office |
| CIEF | Continuous Isoelectric Focusing |
| CIP | Customer Integration Panel |
| CITE | Cargo Integration Test Equipment |
| cm | Centimenter |
| CM-1 | Combustion Module |
| CMDSF | "Crystals, Monomers, Deposition and Separation Facility" |
| CMG | Control Moment Gyro |
| CNES | Centre Nationale d'Études Spatiales |
| CO | Contracting Officer |
| CoDR | Conceptual Design Review |
| COMLAB | Commerce Lab |
| COMM | Commercial Missions |
| COS | Co-Orbiting Satellite |
| COTR | Contracting Officer Technical Representative |
| COTS | Commercial Off The Shelf |
| CPF | Critical Point Facility |
| CPL | Capillary Pumped Loop |
| CPSE | Common Payload Support Equipment |
| CRR | Cargo Readiness Review |
| CRT | Character Recognition Terminal |
| CRU | Catalytic Research Unit |
| CSA | Canadian Space Agency |
| CSC | Consulting Support Center |
| CSD | Comparative Soot Diagnostics |
| CSD | Contract Start Date |
| CSS-IPS | Common Support System-Integrated Payload System |
| CT | Constant Temperature |
| CTL | Communications Test Lab |
| CVD | Chemical Vapor Deposition |
| CVTE | Chemical Vapor Transport Experiment |
| CW | Continuous Wave |
| DACS | Digital Acquisition and Control System |
| DARA | Deutsche Agentur für Raumfahrtangelegenheiten [German Space Agency] |
| DARTFire | Diffusive and Radiative Transport in Fires |
| DAS | Data Acquisition System |
| DBMS | Data Base Management System |
| dc | Direct Current |
| DCDU | Digital Cassette Data Unit |
| DCE | Droplet Combustion Experiment |
| DCF | Droplet Combustion Facility |
| DCR | Design Certification Review |
| DCR | Drawing Change Request |
| DDF | Directors Discretionary Fund |
| DDM | Data Display Module |
| DDM | Drop Dynamics Module |
| DDS | Data Display System |
| DDT&E | "Design, Develop, Test, and Evaluation" |
| DDU | Data Display Unit |
| DEL | Delivery |
| DEP | Dedicated Experiment Processor |
| DFRC | Hugh L. Dryden Flight Research Center |
| DFVLR | Deutsche Forshungs-und Versuchsanstait fur Luft-und |
| DIF | Data Interchange Format |
| DLR | The German Aerospace Research Establishment |
| DMOS | Diffusive Mixing of Organic Solutions |
| DMS | Data Management System |
| DOC | Discipline Operations Center |
| DOD | Department of Defense |
| DOMSAT | Domestic Satellite |
| DPA | Data Processing Assembly |
| DPIMS | Diffusion Processes in Molten Semiconductors |
| DPM | Drop Physics Module |
| DPRO | Defense Procurement Resident Office |
| DR | Data Requirement |
| DSC | Differential Scanning Calorimetry |
| DSF | Directional Solidification Furnace |
| DT/DT | Drop Tube/Drop Tower (Facility) |
| DTA | Differential Thermal Analysis |
| DTA | Development Test Article |
| DTA | Differential Thermal Analysis |
| DTD | Droplet Technology Demonstration |
| DTF | Drop Tube/Tower Facility |
| DTO | Detailed Test Objective |
| DVT | Developmental Vibration Test |
| DWG | Discipline Working Group |
| EAC | Experiment Apparatus Container |
| EALK | External Airlock |
| EBF | Electron Bombardment Furnace |
| ECAS | Experiment Computer Applications Software |
| ECE | Experiment Checkout Equipment |
| ECG | Electroepitaxial Crystal Growth (MRA) |
| ECLSS | Environmental Control/Life Support System |
| ECOS | Experiment Computer Operational Software |
| ECP | Electromagnetic Containerless Processing |
| ECS | Energy Conversion Subsystem |
| ECS | Environmental Control Subsystem |
| ED | Engineering Directorate |
| EDEP | Electrodeposition (UAH) |
| EDM | Engineering Development Model |
| EDO | Extended Duration Orbiter |
| EDR | Engineering Design Review |
| EDS | Energy Dispersive Spectroscopy |
| EEE | "Electronic, Electrical, Electromechanical" |
| EEP | Experiment Electronic Package |
| EEVT | Electrophoresis Equipment Verification Test |
| EGSE | Electrical Ground Support Equipment |
| EHD | Electrohydrodynamic |
| EICG | Electronic/lnfrared Crystal Growth |
| EIRD | Experiment Interface Requirements Document |
| ELV | Expendable Launch Vehicle |
| EM | Engineering Model |
| EMC | Electromagnetic Compatibility |
| EMDI | Extended Mission Duration Items |
| EMI | Electromagnetic Interference |
| EML | Electromagnetic Levitator |
| EMS | Engineering Master Schedule |
| EMS | Experiment Mounting Structure |
| EMU | Extravehicular Maneuvering Unit |
| EMU | Extravehicular Mobility Unit |
| EOM | Earth Observation Mission |
| EOM | Engineering Operations Manual |
| EOS | Earth Observing System |
| EOS | Electrophoresis Operations in Space (MDAC) |
| EPDP | Experiment Power Distribution Box |
| EPROM | Erasable Programmable Read-Only Memory |
| EPS | Electrical Power System |
| ERD | Experiment Requirements Document |
| ESA | European Space Agency |
| ESD | Electrostatic Discharge |
| ESE | Electrical Support Equipment |
| ESM | Experiment Service Module |
| ESPS | Experiment Segment/Pallet Simulator |
| ESRO | European Space Research Organization |
| ESS | Energy Storage Subsystem |
| ESS | Experiment Subsystem Simulator |
| ET | External Tank |
| ETE | External Test Equipment |
| EU | Electronics Unit |
| EURECA | European Retrievable Carrier |
| EVAS | Extravehicular Activity System |
| EXP | Experiment |
| FA | Flight Accommodation |
| FAR | Final Acceptance Review |
| FAWG | Flight Assignments Working Group |
| FCA | Flow Control Assembly |
| FDD | Flight Data Document |
| FDE | Fluid Dynamics Experiment |
| FDF | Flight Data File |
| FDOR | Final Design and Operations Review |
| FDR | Final Design Review |
| FDSMM | Fluid Dynamics and Solidification of Metallic Melts |
| FEA | Fluids Experiment Apparatus |
| FEP | Front End Processor |
| FES | Fluids Experiments System |
| FES | Flash Evaporator System (an Orbiter subsystem) |
| FES | Fluids Experiment System |
| FES/VCGS | Fluid Experiment/Vapor Crystal Growth System |
| FF | Free Flyer |
| FFDF | Fluid Physics and Dynamics Facility |
| FFEU | Free-Flow Electrophoresis Unit |
| FFFT | Forced Flow Flamespread Test |
| FHA | Flight Hardware Availability |
| FMEA-CIL | Failure Modes and Effects Analyses/Critical Items List |
| FMPT | First Material Processing Test (Japan) |
| FO | Functional Objectives |
| FOR | Flight Operations Review |
| FOV | Field of View |
| FPDF | Fluid Physics/Dynamics Facility |
| FPE | Fundamental Phenomena Experimentation |
| FRB | Failure Review Board |
| FRE | Functional Requirements Envelope |
| FRR | Flight Readiness Review |
| FS | Factor of Safety |
| FSD | Fabrication Support Division |
| FSDC | Fiber Supported Droplet Combustion |
| FSDM | Free Surface Deformation Measurement System |
| FSS | Flight Support System |
| FSUWG | Facility Science Users Working Group |
| FU | Flight Unit |
| FY | Fiscal Year |
| FZCGF | Float Zone Crystal Growth Facility (Battelle) |
| FZES | Float Zone Experiment System |
| g | Gravity |
| g0 | normal gravity acceleration at sea-level |
| GaAs | Gallium Arsenide |
| GAC | Grumman Aerospace Corporation |
| GAS | Get-Away-Special |
| GAS Can | Get-away Special Canister |
| GAS Can | Get-Away-Special Canister |
| GBX | Glovebox |
| GC-MS | Gas Chromatograph-Mass Spectrometer |
| GCE | Ground Control Experiment |
| GCEL | Ground Control Experiment Laboratory |
| GDFE | Gas-Jet Diffusion Flames Experiment |
| GEF | Gas Evaporation Experiment Facility (Japan) |
| GEM | Generic Experiment Module |
| GEO | Geosynchronous Earth Orbit |
| GERME | "Groupe D'Etude et Recherches, Sur Test Materieux Dans " |
| GEVS | General Environmental Verification Specification |
| GFE | Government Furnished Equipment |
| GFFC | Geophysical Fluid Flow Cell |
| GFGAS | Gradient Furnace for Get Away Special |
| GFP | Glass Fiber Pulling |
| GFP | Government Furnished Property |
| GH | Growth Hormone |
| GHF | Gradient Heating Facility |
| GHF | Gradient Heating Furnace (Japan) |
| GIDEP | Government/Industry Data Exchange Program |
| GIFFTS | Gravitational Influences on Flammability and Flamespread |
| GIRD | Ground Integration Requirements Document |
| GMT | Greenwich Mean Time |
| GN&C | " Guidance, Navigation and Control" |
| GOR | Ground Operations Review |
| GPC | General Purpose Computer |
| GPF-1&2 | General Purpose Furnace |
| GPRF-G | General Purpose Rocket Furnace-Gradient |
| GPRF-I | General Purpose Rocket Furnace -Isothermal |
| GPS | Global Position Satellite |
| GPS | Global Positioning System |
| GPU | Ground Power Unit |
| GSE | Ground Support Equipment |
| GSFC | Goddard Space Flight Center |
| GT | Ground Test |
| H/W | Hardware |
| HAB | Habitability |
| HAL | High-temperature Acoustic Levitator |
| HAL/S | High-Order Programming Language for Spacelab Usage |
| HDR | High Data Rate |
| HDRR | High Data Rate Recorder |
| HDW | Hardware |
| HGCS | Human Granulocyte Colony Stimulating |
| HGS | Holographic Ground System |
| HH-G | Hitchhiker (Goddard) |
| HH-M | Hitchhiker (MSFC) |
| HHVT | " High Resolution, High Frame Rate Video Technology" |
| HIA | Holographic Imaging Apparatus |
| HM | Habitation Module |
| HMF | Health Maintenance Facility |
| HOSC | Huntsville Operations Support Center |
| HPA | Handling and Positioning Aid |
| HPCG | Hand-held Protein Crystal Growth |
| HPF | Heat Pipe Furnace |
| HPIR | Heat Pipe Radiator |
| HQ | Headquarters |
| HRAP | Heat Rejection Augmentation Package |
| HRF | Human Research Facility |
| HRM | High Rate Multiplexer |
| HRT | High-Resolution Thermometer |
| HTFT | High Temperature Furnace Technology |
| HTGPF | High Temperature General Purpose Furnace |
| HTM | High Temperature Materials |
| HX | Heat Exchanger |
| Hz | Hertz (Cycles per Second) |
| IBSE | Initial Blood Storage Experiment |
| ICD | Interface Control Document |
| ICD | Interface Control Drawing |
| ICE | Interface Configuration Experiment |
| IDE | Initial Design Evaluation |
| IDGE | Isothermal Dendritic Growth Experiment |
| IDGE | Isothermal Dendrite Growth Experiment |
| IDMS | Information and Data Management System |
| IEF | Isoelectric Focusing Experiment |
| IF | Intermediate Frequency |
| IFF | Isoelectric Focusing Facility |
| IFM | Interface Measurements |
| IG | Igloo (Spacelab Pallet Missions) |
| IGI | Industrial Guest Investigator |
| IH/SR | Integration Hardware/Software Review |
| IHF | Isothermal (Japan) |
| II | Industrial Investigator |
| IIA | Instrument Interface Agreements |
| IM | Interface Measurements |
| IMF | Image Furnace (Japan) |
| IML | International Microgravity Laboratory |
| IMU | Inertial Measurement Unit |
| INEPT | EN Engineering Panel Telemail |
| IOC | Initial Operating Capability |
| IOC | Initial Orbiting Capability |
| IOU | Input/Output Unit |
| IPL | Integrated Payload |
| IPRD | Integrated Payload Requirements Document |
| IPS | Instrument Pointing System |
| IR&D | Independent Research and Development |
| IRD | Interface Requirements Document |
| IRIG | Inter-range instrumentation group (time format in Spacelab) |
| IRR | Initial Requirements Review |
| IRR | Integration Readiness Review |
| IRR | Interface Requirements Review |
| IRSM | Incubator Refrigerator Storage Module |
| ISA | Inertial Sensor Assemblies |
| ISC | International Space Corporation |
| ISET | Intercenter Systems Engineering Team |
| ISF | Industrial Space Facility |
| ISR | Interim Systems Review |
| ISSP | Information System Strategic Plan |
| ISTF | Integrated Services and Test Facility (Canada) |
| ISY | International Space Year (1992) |
| ITA | "Instrumentation Technology Associates, Inc." |
| ITIP | International Technology Integration Panel |
| ITUS | Integrated Thermal Utility System |
| IVA | Intravehicular Activity |
| IWG | Investigator Working Group |
| JCA | Joint Cooperative Agreement |
| JEA | Joint Endeavor Agreement |
| JEM | Japanese Experiment Module |
| JIS | Joint Integration Simulation |
| JPL | Jet Propulsion Laboratory |
| JSC | Johnson Space Center |
| JSLWG | Joint Spacelab Working Group |
| JURG | Joint User Requirements Group |
| K | Kelvin |
| KBPS | Kilobytes Per Second |
| kg | Kilogram |
| KSC | Kennedy Space Center |
| LAB | Laboratory |
| LAN | Local Area Network |
| LaRC | Langley Research Center |
| LASS | Large Amplitude Space Simulator |
| LBTF | Langmuir-Blodgett Trough Facility |
| LDEF | Long Duration Exposure Facility |
| LDF | Liquid Drop Experiment Facility (Japan) |
| LDR | Large Deployable Reflector |
| LDR | Low Data Rate |
| LDV | Laser Doppler Velocimetry |
| LDV | Laser Doppler Velocimetry |
| LED | Light Emitting Diode |
| LEO | Low Earth Orbit |
| LeRC | Lewis Research Center |
| LIF | ....Large Isothermal Furnace |
| LIMS | Lewis Information Management System |
| LLSI | Laser Light Scattering Instrument |
| LM | Logistics Module |
| LME | Liquid Motion Experiment |
| LMI | Lewis Management Instruction |
| LOS | Line of Sight |
| LOS | Loss of Signal |
| LPE | Lambda Point Experiment |
| LPES | Lamda Point Experiment System |
| LPS | Launch Processing System |
| LPS | Liquid Phase Sintering |
| LS | Life Sciences |
| LSA | Large Space Antenna |
| LSE | Laboratory Support Equipment |
| LSLAB | Life Sciences Laboratory |
| LSRF | Life Sciences Research Facility |
| LSSP | Launch Site Support Plan |
| LSW | "Lifshitz, Slyozov and Wagner (Theory of Alloys)" |
| LTE | Levitator Technology Experiment (ACES II) |
| LTGHE | Low-Temperature Gradient Heating Furnace |
| LTRF | Low Temperature Research Facility |
| LVLH | " Local Vertical, Local Horizontal" |
| LVLH | " Local Vertical, Local Horizontal Meter" |
| µg | Microgravity |
| m | Meter |
| M&P | Materials and Processes |
| MA | Mission Assignment |
| MA | Multiple Access |
| MAC | Microgravity Advisory Committee |
| MAP | Mission Activity Plan |
| MAS | Metals/Alloy Solidification |
| MASA | Metals and Alloys Solidification Apparatus |
| MASU | Metal Alloy Separation Unit |
| MAUS | Materialwissen Autonomoe Experi Uter Schwerelosigkeit |
| MBE | Molecular Beam Epitaxy |
| MBPS | Megabytes Per Second |
| MCC | Mission Control Center |
| MCD | Modular Capabilities Document |
| MCDS | Management Communications and Data System |
| MCF | Modular Combustion Facility |
| MCP | Monitoring Control Panel |
| MCPF | Modular Containerless Processing Facility |
| MCU | Marangoni Convection Unit |
| MD | Middeck |
| MDAC | MacDonnell Douglas Aerospace Corporation |
| MDB | Master Data Base |
| MDE | Mission Dependent Equipment |
| MDM | Multiplexer/Demultiplexer |
| MDTSCO | MacDonnell Douglas Technical Services Company |
| MEA | Materials Experiment Assembly |
| MEL | Modular Electromagnetic Levitator |
| MEM | Middeck Electronics Module |
| MEPF | Multiple Experiment Processing Furnace |
| MEPHISTO | Matériel pour l'Étude des Phenomènes Intéressants |
| MFCD | Microgravity Fluids and Combustion Diagnostics |
| MFCT | Modular Furnace Component Technology |
| MGM | Mechanics of Granular Materials |
| MGSE | Mechanical Ground Support Equipment |
| MHF | Mirror Furnace (ESA) |
| MHRR | MSAD Hardware Reflight Review |
| MIA | Mission Implementation Agreement |
| MIC | Management Information Center |
| MICG | Mercury Iodide Crystal Growth |
| MICOM | Mission Command |
| MINC | Module Interconnect |
| MIP | Mission Integration Panel |
| MIS | Magnetic Isolation System |
| MIS | Management Information System |
| MIT | Massachusetts Institute of Technology |
| MIUL | Material Identification and Usage List |
| MLI | Multilayer Insulation |
| MLR | Monodisperse Latex Reactor |
| MLRS | Monodisperse Latex Reactor System |
| MLSA | Modified Launch Services Agreement |
| MMAP | Microgravity Measurement and Analysis Project |
| MMFF | Modular Multizone Furnace Facility (now SSFF) |
| MMO | Mission Management Office Meeting |
| MMP | Magnetospheric Multiprobe |
| MMPF | Microgravity and Materials Processing Facility |
| MMSL | Microgravity Materials Science Laboratory |
| MMU | Manned Maneuvering Unit |
| MMU | Mass Memory Unit |
| MOD | Module |
| MORD | Mission Operations Requirements Document |
| MOU | Memorandum of Understanding |
| MP | Microgravity Pressure |
| MP | Major Payload |
| MPA | " Microgravity Pressure, Ambient" |
| MPAK | Middeck Payload Accommodation Kit |
| MPE | Mission Peculiar Equipment |
| MPESS | Mission Peculiar Experiment Support Structure |
| MPS | Materials Processing in Space |
| MRA | Mechanical Readiness Assessment |
| MRA | Microgravity Research Associates |
| MRB | Material Review Board |
| MRD | Mission Requirements Document |
| MRDB | Mission Requirements Data Base |
| MRI | Midwest Research Institute |
| MRMS | Mobile Remote Manipulator System |
| MROFIE | Mission Requirements on Facilities/Instruments/Experiments |
| MRR | Mission Readiness Review |
| MRWG | Mission Requirements Working Group |
| MS | Margin of Safety |
| MS | Materials Science |
| MSA | Microgravity Science and Applications (Program) |
| MSAD | Microgravity Science and Applications Division |
| MSC | Microgravity Smoldering Combustion Experiment |
| MSDR | Materials Science Double Rack |
| MSEIS | Microgravity Systems Engineering Information System |
| MSFC | Marshall Space Flight Center |
| MSL | Microgravity Science Laboratory |
| MST | Measurement Status Table |
| MTE | Mass Transport Experiment |
| MTL | Manufacturing and Technology Laboratory |
| MTPE | Mission to Planet Earth (NASA)-Code Y |
| MTU | Master Timing Unit |
| MUA | Material Utilization Agreement |
| MWEU | Moving Wall Electrophoresis Unit |
| MWSF | Molecular Wake Shield Facility |
| NAC | NASA Advisory Council |
| NAR | Non-Advocate Review |
| NASA | National Aeronautics and Space Administration |
| NASACOM | NASA Communications System |
| NASDA | National Space Development Agency of Japan |
| NBS | National Bureau of Standards |
| NCC | NASA Communications Control |
| NCTM | Non-Contact Temperature Measurements |
| NFF | Normal Freezing Furnace |
| NHB | NASA Handbook |
| NIA | Network Interface Adapter |
| NIH | National Institutes of Health |
| NIST | National Institute for Standards and Technology |
| NIU | Network Interface Unit |
| NLO | Nonlinear Optical |
| NLOMTF | Non-Linear Optical Monomer Thin Films (UAH) |
| NLOOC | Non-Linear Optical Organic Crystals (UAH) |
| nm | Nanometers |
| nm | Nautical Miles |
| NMI | NASA Management Instruction |
| NMMSA | NASA Microgravity Materials Science Assessment Task Force |
| NOA | New Obligation Authority |
| NOAA | National Oceanic and Atmospheric Administration |
| NRA | NASA Research Announcement |
| NRC | National Research Council |
| NRL | Naval Research Laboratory |
| NSF | National Science Foundation |
| NSPAR | Nonstandard Parts Approval Request |
| NSSDC | National Space Science Data Center |
| NSTL | National Space Technology Laboratories |
| NSTS | National Space Transportation System |
| O&C | Operations and Checkout |
| OACT | Office of Advanced Concepts and Technology |
| OAFD | Orbiter Aft Flight Deck |
| OARE | Orbital Acceleration Research Experiment |
| OCF | Organic Crystal Growth Facility (ESA) |
| OCP | Office of Commercial Programs (NASA) - Code I |
| OCZ | Operational Control Zone |
| OFPU | Optical Fiber Production Unit |
| OFT | Orbital Flight Test |
| OIA | Orbiter Interface Adaptor |
| OLMSA | Office of Life Sciences and Microgravity Applications |
| OMCVD | Organometallic Chemical Vapor Epitaxy |
| OMRS | Operations and Maintenance Requirements Specifications |
| OMS | Orbital Maneuvering System |
| OMS&A | Office of Mission Safety and Assurance |
| OMU | Orbital Maneuvering Unit |
| OMV | Orbital Maneuvering Vehicle |
| OPCGA | Observable Protein Crystal Growth Apparatus |
| OPCGF | Organic and Polymer Crystal Growth Facility |
| OPF | Orbiter Processing Facility |
| OPPE | Organic and Polymer Processing Experiment (3M) |
| ORAM | Orbital Repair and Maintenance |
| ORSEP | Organic Separation |
| ORU | Orbital Replacement Unit |
| OSF | Office of Space Flight (NASA) - Code M |
| OSO | Office of Space Operations (NASA) -Code T |
| OSS | Office of Space Science (NASA) - Code S |
| OSS | Office of Space Station (NASA) - Code S |
| OSTDS | Office of Space Tracking and Data Systems (NASA) - Code T |
| OSV | Orbital Servicing Vehicle (Japan) |
| OSV | Orbiting Servicing Vehicle (Japan) |
| OTA | Office of Technology Assessment |
| OTFE | Oscillatory Thermocapillary Flow Experiment |
| OTV | Orbital Transfer Vehicle |
| PA | Power Amplifier |
| PA | Product Assurance |
| PACE | Physics and Chemistry Experiment Program |
| PACS | Pointing And Control System |
| PAD | Program Approval Document |
| PaDR | Payload Design Review |
| PAI | Product Assurance Instruction |
| PAM | Payload Accommodation Manager |
| PAM | Payload Assist Module |
| PAM | Project Assurance Manager |
| PAM | Project Assurance Manual |
| PAP | Product Assurance Plan |
| PBE | Pool Boiling Experiment |
| PC | Personal Computer |
| PCA | Payload Clamp Assembly |
| PCB | Power Control Box |
| PCCE | Particle Cloud Combustion Experiment |
| PCDA | Power Control and Distribution Assembly |
| PCG | Protein Crystal Growth |
| PCGS | Protein Crystal Growth System |
| PCM | Pulse Code Modulation |
| PCM | Pulse Code Modulator |
| PCR | Payload Certification Review |
| PCTC | Payload Crew Training Complex |
| PCU | Payload Checkout Unit |
| PCU | Power Control Unit |
| PCU | Power Conversion Unit |
| PDA | Phase Doppler Pneumometer |
| PDI | Particle Displacement Interfermetry |
| PDP | Plasma Diagnostics Package |
| PDR | Preliminary Design Review |
| PDRD | Program Definition and Requirements Document |
| PDSS | Payload Development Support System |
| PE | Principle Engineer |
| PED | Payload Element Developer |
| PEPWG | Pressurized Element Working Group |
| PF | Platform |
| PFA | Post-Flight Annex |
| PFDAR | Post-Flight Data Analysis Review |
| PFM | Protoflight Model |
| PFP | Program and Financial Plan |
| PGS | Power Generation Subsystem |
| pH | Hydrogen lons in Gram Atoms per Liter |
| PI | Payload Interrogator |
| PI | Preliminary Investigation |
| PI | Principal Investigator |
| PIC | Project Initiation Conference |
| PID | Prime Item Development (Spec) |
| PID | Program Introduction Document |
| PID | "Proportional, Integral, and Differential Gain" |
| PIMS | Principal Investigator Microgravity Services |
| PIP | Payload Integration Plan |
| PIV | Particle Image Velocimetry |
| PL | Payload |
| PM | Program Manager |
| PM | Project Manager |
| PMAD | Power Management and Distribution |
| PMC | Permanent Manned Capability |
| PMIC | Payload Missions Integration Contractor |
| PMMS | Process Material Management System |
| PMR | Program Management Review |
| PMT | photomultiplier tube |
| PMZF | Programmable Multizone Furnace |
| POCC | Payload Operations Control Center (at MSFC) |
| POD | Payload Operations Director |
| POIC | Payload Operation and Integration Center |
| POO | Pallet of Opportunity |
| POOC | Payload of Opportunity Carrier |
| POP | Perpendicular to Orbit Plane |
| POP | Program Operating Plan |
| POWG | Payload Operations Working Group |
| PP | Phase Partitioning |
| PP | Planning Package |
| PP&C | Payload Planning and Control |
| PP/L | Partial Payload |
| PPE | Phase Partitioning Experiment |
| PPO | Planning Purposes Only |
| PRACA | Problem Reporting and Corrective Action |
| PRCB | Program Requirements Change Board |
| PRE | Performance Requirements Envelope |
| PROM | Programmable Read-Only Memory |
| PRR | Preliminary Requirements Review |
| PRR | Program Requirements Review |
| PS | Payload Specialist |
| PS | Phase Separation |
| PS | Project Scientist |
| PSC | Performing Support Center |
| PSCN | Program Support Communications Network |
| psia | Pounds Per Square Inch Absolute |
| PSR | Pre-Ship Review |
| PV | Photovoltaic |
| PVT | Physical Vapor Transport |
| PVTOS | Physical Vapor Transport of Organic Solutions (3M) |
| QA | Quality Assurance |
| QE | Quality Engineering |
| QSAM. | Quasi-steady Acceleraton Measurement System |
| R&D | Research and Development |
| R&M | Reliability and Maintainability |
| R&PM | Research and Program Management |
| RAHF | Research Animal Holding Facility |
| RAPIV | Radiographic Particle Image Velocimetry |
| RAU | Remote Acquisition Unit |
| RBFS | Risk-Based Fire Safety |
| RCB | Requirements Change Board |
| RCG | Reference Concept Group |
| RCS | Reaction Control System |
| RDR | Requirements Definition Review |
| RDR | Requirements Definition Review |
| RF | Radio Frequency |
| RFI | Radio Frequency Interference |
| RFP | Request For Proposal |
| RFQ | Request For Quotation |
| RI | Rockwell International |
| RID | Review Item Discrepancy |
| RIEF | Recirculating Isoelectric Focusing |
| RITSI | Radiative Ignition and Transition to Spread Investigation |
| RKT | Rocket |
| RMMR | Reactionless Microgravity Mechanisms and Robotics |
| RMS | Remote Manipulator System |
| ROC | Regional Operations Center |
| RP | Reference Publication |
| RP | Rocket Propellant |
| RPCVD | Remote Plasma-enhanced Chemical Vapor Epitaxy |
| RPDP | Recoverable Plasma Diagnostics Package |
| RPI | Rensselaer Polytechnic Institute |
| RR | Requirements Review |
| RSD | Rainbow Schlieren Deflectometry |
| RTE | Radiative Transfer Equation |
| RTOP | Research and Technology Operations Plans |
| RTS | Remote Triaxial Sensors |
| RUR | Reference Update Review |
| RUR | Requirements Update Review |
| S&T | Science and Technology (Center) |
| S&TWG | Science and Technology Working Group |
| S/L | Spacelab |
| S/W | Software |
| SAA | South Atlantic Anomaly |
| SAA | Science And Applications |
| SAAC | Space Applications Advisory Committee |
| SAAG | Science and Applications Advocacy Group |
| SAAL | Single-Axis Acoustic Levitator |
| SAAR | Small and Rapid Response |
| SAAX | Science and Applications Missions (No.) |
| SAB | Space Applications Board |
| SAGE | Standard Assurance Guidelines for Experiments |
| SAIL | Shuttle Avionics Integration Laboratory |
| SAL | Spread Across Liquids |
| SAMPIE | Solar Array Module Plasma Interaction Experiment |
| SAMS | Space Acceleration Measurement Systems |
| SAMS-FF | Space Acceleration Measurement System for Free Flyers |
| SAMS-II | Space Acceleration Measurement System for International Space Station |
| SAO | Safety Assurance Office |
| SATS | Station Accommodation Test Sets |
| SBIR | Small Business Innovative Research |
| SCD | Source Control Document |
| SCEF | Stress Corrosion Evaluation Form |
| SCES | Static Column Electrophoretic Separator |
| SCF | Supercritical Fluid |
| SCG | Solution Crystal Growth |
| SCIF | Static Column Isoelectric Focusing |
| SCO | Schedule Coordinating Office |
| SCOS | Subsystem Computer Operating System |
| SCU | Signal Control Unit |
| SCU | System Control Unit |
| SDA | Solute Diffusion Apparatus |
| SDR | System Design Review |
| SDT | Science Definition Team |
| SE&I | System Engineering and Integration |
| SEB | Source Evaluation Board |
| SED | Space Experiments Division |
| SEDCCS | SED Configuration Control System |
| SEF | Space Experiment Facility |
| SEID | Spacelab Experiment Interface Device |
| SEL | Space Experiments Laboratory |
| SEM | Scanning Electron Microscopy |
| SEMS | Shuttle Environment Monitoring System |
| SEP | Support Electronics Package |
| SESAC | Space and Earth Science Advisory Committee |
| SESCO | Severe Environment Systems Company |
| SHAP | Sample Handling and Analysis Plan |
| SI | International System of Units |
| SIB | System Integration Board |
| SII | "Space Industries, Inc." |
| SIM | Simulation |
| SIMS | Simulations of Spacelab Missions |
| SIPS | Spacelab Input Processing System |
| SIR | Systems Integration Review |
| SIV | Stereo Imaging Velocimeter |
| SL | " ESA Spacelab (in Space Shuttle cargo bay; e.g., IML and USML)" |
| SL-D1 | First German Spacelab |
| SL-D2 | Second German Spacelab |
| SL-J | Japanese Spacelab |
| SLDPF | Spacelab Data Processing Facility |
| SLS | Spacelab Life Sciences |
| SLS | Spacelab Simulator |
| SLSI | Surface Light Scattering Instruments |
| SM | Short Module |
| SOPS | Spacelab Output Processing System |
| SOTA | State of The Art |
| SOW | Statement Of Work |
| SPA | Small Payload Accommodations |
| SPA | Software Product Assurance |
| SPAH | Spacelab Payload Accommodation Handbook |
| SPAR | Space Processing Applications Rocket |
| SPAR | Standard Payload Assurance Requirements |
| SPAS | German Shuttle Pallet Satellite |
| SPGEN | "Space Station Planning Group, EN" |
| SPICE | Spacelab Payload Integration and Coordination in Europe |
| SPL | Sonic Pump Levitator |
| SPPO | Spacelab Payload Project Office (MSFC) |
| SPS | Samples Per Second |
| SPSME | Spacelab Payload Standard Modular Electronics |
| SQUID | Superconducting Quantum Interference Detector |
| SR | Science Requirements |
| SR&QA | "Safety, Reliability, and Quality Assurance" |
| SRB | Solid Rocket Booster |
| SRD | Science Requirements Document |
| SRD | Shuttle Requirements Definition |
| SRD | Shuttle Requirements Document |
| SRD | Software Requirements Document |
| SRR | Site Readiness Review |
| SRR | System Requirements Review |
| SS | Space Station |
| SSB | Space Science Board |
| SSC | Support Service Contractor |
| SSCB | Space Station Control Board |
| SSCC | Space Station Control Center |
| SSCE | Solid Surface Combustion Experiment |
| SSDMS | Space Station Data Management System |
| SSDS | Space Station Data Systems |
| SSFF | Space Station Furnace Facility |
| SSIP | Shuttle Student Involvement Project |
| SSIS | Space Station Information System |
| SSOTF | Space Station Operations Task Force |
| SSP | Space Station Program |
| SSPE | Space Station Program Element |
| SSSAAS | Space Station Science and Applications Advisory Subcommittee |
| SSSC | Space Station Support Center |
| SSST | Space Station Systems Trainer |
| SSWP | Space Station Work Package |
| STAMPS | Scientific and Technological Aspects of Materials Processing |
| STB | Science and Technology Board |
| STD | Standard |
| STDCE | Surface Tension Driven Convection Experiment |
| STEF | Space Test and Evaluation Facility |
| STEP | Satellite Test of the Equivalence Principle |
| STEP | Space Technology Experiments Platform |
| STR | System Test Review |
| STS | Space Transportation System |
| STS | Shuttle Transportation System |
| STS | Space Transportation System |
| STT | Spacelab Transfer Tunnel |
| SURF | Space Ultra-vacuum Research Facility |
| SVP | Space Vehicle Pressure |
| SW | Software |
| T&C | Telemetry And Command |
| T/L | Timeline |
| TAG | Technology Advocacy Group |
| TBD | To Be Determined |
| TBD | To Be Done |
| TBE | Teledyne Brown Engineering |
| TBS | Thermal Bus System |
| TC | Thermal Control |
| TCR | Technical and Cost Review |
| TCS | Test Control Supervisor |
| TCS | Test Control System |
| TCS | Thermal Control Subsystem |
| TCS | Thermal Control System |
| TDAS | Tracking and Data Acquisition Satellite |
| TDASS | Tracking and Data Acquisition Satellite System |
| TDL | Technology Development Laboratory |
| TDM | Technology Development Missions |
| TDMP | Technology Development Missions Polar (Canada) |
| TDMX | Technology Development Missions (No.) |
| TDP | Technology Development Program |
| TDRS | Tracking and Data Relay Satellite |
| TDRSS | Tracking and Data Relay Satellite System |
| TEA | Technical Exchange Agreement |
| TEA | Torque Equilibrium Attitude |
| TEM | Transmission Electron Microscopy |
| TEMPUS | Electromagnetic Containerless Processing Facility |
| TEQb | Thermal Equilibration-bis |
| TES | Thermal Energy Storage |
| TEZG | Tribological Experiments in Zero Gravity |
| TFCG | Thin Film Crystal Growth |
| TFDU | Thin Film Deposition Unit |
| TFSUS | Task Force on Scientific Uses of the Space Station |
| TGDF | Turbulent Gasjet Diffusion Flames |
| TGDF | Transitional/Turbulent Gas Jet Diffusion Flames |
| TGS | Telemetry Ground Station |
| TGS | Telemetry Ground System |
| TGS | Triglycine Sulfate |
| THR | Test Hardware Received |
| TID | Test Installation Division |
| TIM | Technical Interchange Meeting |
| TLM | Telemetry |
| TME | Test and Measurement Equipment |
| TMIS | Technical and Management Information System |
| TMM | Thermal Mathematical Model |
| TMS | Thermal Maneuvering System |
| TPC | Technical Performance Criteria |
| TPCE | Tank Pressure Control Experiment |
| TPFE | Two-Phase Flow Experiment |
| TRW | Thompson Ramo Woolridge |
| TSS | Tethered Satellite System |
| TT&C | " Telemetry, Tracking and Command" |
| TU | Technology Utilization |
| TU | Transport Unit |
| U.S. | United States |
| U.S.C. | United States Code |
| U/D | Update |
| UAB | University of Alabama in Birmingham |
| UAH | University of Alabama in Huntsville |
| UCSD | " University of California, San Diego" |
| UI0 | User Integration Office |
| UISWG | User Information System Working Group |
| UMRIS | User Mission Requirements and Information System |
| UOF | User Operation Facility |
| UPN | Unique Project Number |
| USAF | United State Air Force |
| USL | United States Laboratory |
| USML | United States Microgravity Laboratory |
| USML-2 | United States Microgravity Laboratory-2 |
| USMP | United States Microgravity Payload |
| USMP-2 | United States Microgravity Payload-2 |
| USRA | Universities Space Research Association |
| UTC | User Time Clock |
| V | Volts |
| VAB | Vehicle Assembly Building |
| VAFB | Vandenberg Air Force Base |
| VAK | Vertical Access Kit |
| VCAP | Vehicle Charging and Potential |
| VCG | Vapor Crystal Growth |
| VCGS | Vapor Crystal Growth System |
| VDA | Vapor Diffusion Apparatus |
| VDC | Volts Direct Current |
| VER | Verification |
| VET | Video Event Trigger |
| VFI | Verification Flight Instrumentation |
| VHSIC | Very High Speed Integrated Circuit |
| VIBES | Vibration Isolation in a Box Experiment System |
| VIT | Vibration Isolation Technology |
| VITR | Video/Instrumentation Tape Recorder |
| VMA | Vacuum Maintenance Assembly |
| VPF | Vertical Processing Facility |
| VTRE | Vented Tank Resupply Experiment |
| WBR | Workbench Rack |
| WBRIS | Workbench Rack Illuminations Subassembly |
| WBS | Work Breakdown Structure |
| WCS | Waste Control System |
| WFF | Wallops Flight Facility |
| WIF | Wire Insulation Flammability Experiment |
| WP | Work Package |
| WSGT | White Sands Ground Terminal |
| WTR | Western Test Range |
| WWV | "National ""Time Standard"" Call Letters" |
| XRD | X-ray Diffraction |
| ZCG | Zeolite Crystal Growth |
| ZENO | Critical Fluid Scattering Experiment (CFLSE) |
| ZOE | Zone of Exclusion |
