-A-
| A | Ampere |
| A/D | Analog to Digital |
| AA | Associate Administrator |
| AAA | Avionics Air Assembly |
| ABRS | Advanced Biological Research System |
| AC | Alternating Current |
| ACE | Advanced Colloids Experiment |
| ACME | Advanced Combustion Microgravity Experiment |
| ACS | Atmospheric Control and Supply |
| ACUC | Animal Care and Use Committee |
| ACWP | Actual Cost of Work Performed |
| ADAS | Ambulatory Data Acquisition System |
| ADM | Acquisition Decision Memorandum |
| ADP | Acceptance Data Package |
| AEE | Advanced Engineering Environment |
| AEMC | Advanced Environmental Monitoring and Control, GFM-2 |
| AEON | Advanced Engineering Operations Network Portal |
| AER | Advanced Exploration Research |
| AES | Anthropometric EVA Suit |
| AEVA | Advanced Extra Vehicular Activity |
| AFC | Auxiliary Fluids Container |
| AFT | Advanced Food Technology |
| AHLS | Advanced Human Life Support |
| AIM | Advanced Integrated Matrix |
| AL | Air Lock |
| ALI | Alice-Like Insert |
| ALP | Advanced Liquid Pumps |
| ALS | Advanced Life Support |
| AO | Announcement of Opportunity |
| AoA | Analysis of Alternatives |
| AOA | Annual Operating Agreement |
| AOS | Acquisition of Signal |
| AP | Acceleration Projects |
| APB | Accounting Principles Board |
| APB | Acquisition Program Baseline |
| APCP | Automated Procedure Control Panel |
| APG | Annual Performance Goal |
| API | Application Programming Interface |
| APID | Application Process Identifier |
| APMC | Agency Program Management Council |
| APOM | Assistant Payload Operations Manager |
| APPL | Academy of Program and Project Leadership |
| APS | Automated Payload Switch |
| APSSP | Advanced Propulsion Systems and Space Power |
| APV | Automated Procedure Viewer |
| AR | Anomaly Report |
| AR | Air Revitalization |
| ARC | Ames Research Center |
| ARD | Aeronautics Research Mission Directorate |
| ARED | Advanced Resistive Exercise Device |
| ARIS | Active Rack Isolation System |
| ARIS | Active Rack Isolation Unit |
| ARIS-ICE | Aris-Iss Characterization Experiment |
| ARM | Active Risk Manager |
| ARMD | Aeronautics Research Mission Directorate |
| ARR | Assemble, Test, and Launch Operations (ATLO) Readiness Review |
| ARS | Air Revitalization System |
| AS | Ascent Stage |
| AS | Acquisition Strategy |
| ASBCA | Armed Services Board of Contract Appeals |
| ASCB | Avionics Software Control Board |
| ASCII | American Standard Code for Information Interchange |
| ASI | Agency Safety Initiative |
| ASIC | Application-Specific Integrated Circuit |
| ATCS | Air Thermal Control System |
| ATCU | Air Thermal Control Unit |
| ATD | Advanced Technology Development |
| ATHINA | Investigation of Diffusion Flame Tip Thermo-diffusive and Hydrodynamic Instability Under Microgravity Conditions |
| ATP | Authority to Proceed |
| ATP | Acceptance Test Plan |
| AUID | Agency Issued ID |
| AWG | American Wire Gauge |
-B-
| BAA | Broad Area Announcement |
| BAC | Budget at Completion |
| BAD | Broadcast Ancillary Data |
| BASS | Burning and Suppression Of Solids |
| BCAT | Binary Colloidal Alloy Test |
| BCAT-3 | Binary Colloidal Alloy Test – 3 |
| BCAT-4 | Binary Colloidal Alloy Test – 4 |
| BCAT-5 | Binary Colloidal Alloy Test – 5 |
| BCAT-C1 | Binary Colloidal Alloy Test CSA Payload-1 |
| BCDCE | Bi-Component Droplet Combustion Experiment |
| BCOEL | Boiling Heat Transfer & Control of Bubble Motion in Microgravity using Electric Fields |
| BCPR | Bioastronautics Critical Path Roadmap |
| BCWP | Budgeted Cost for Work Performed |
| BDiSL | Buoyancy Driven Instabilities in Single Bubble Sonoluminescence |
| BH | Big Habitat |
| BIO | Biological |
| BMP | Biomass Production |
| BOE | Basis-of-Estimate |
| BPRAC | Biological and Physical Research Advisory Committee |
| BPRR | Biological and Physical Research Rack |
| BRE | Burning Rate Emulator |
| BVX | Bulk Viscosity of Xenon |
| BXF | Boiling Experiment Facility |
| BY | Budget Year |
-C-
| C&C | Command and Control |
| C&DH | Command and Data Handling |
| C&T | Communications and Telemetry |
| C&T | Communications and Tracking |
| C&W | Caution and Warning |
| C4ISP | Command, Control, Communications, Computers and Information Systems Protection |
| CAD | Cost Analysis Division |
| CAD | Computer Aided Design |
| CADRe | Cost Analysis Data Requirement |
| CAI | Communications, Avionics, and Informatics |
| CAIB | Columbia Accident Investigation Board |
| CAIG | Cost Analysis Improvement Group |
| CAIV | Cost as an Independent Variable |
| CAN | Controller Area Network |
| CANSEI | Control and Network Systems, Electrical power, and ICS communication officer |
| CATS | Cloud-Aerosol Transport SysteM |
| CARD | Cost Analysis Requirements Document |
| CBE | Current Best Estimate |
| CBT | Computer Based Training |
| CCA | Clinger-Cohen Act |
| CCB | Configuration Control Board |
| CCBD | Configuration Control Board Directive |
| CCD | Charge-Coupled Device |
| CCF | The Cleveland Clinic Foundation |
| CCF | Critical Velocities in Open Capillary Channels |
| CCIAM | Color Camera Image Acquisition Module |
| CCSDS | Consultative Committee for Space Data Systems |
| CCR | Central Contractor Registry |
| CCRM | Continuous Cost Risk Management |
| CCU | Confocal Control Unit |
| CDD | Capability Development Document |
| CDMS | Command and Data Management System |
| CDOT | Colloidal Disorder-Order Transitions Experiment |
| CDR | Critical Design Review |
| CDRA | Carbon Dioxide Removal Assembly |
| CDRL | Contrac Data Requirements List |
| CDS | Central Data System |
| CDS | Cargo Delivery System |
| CE&R | Concept Exploration and Refinement |
| CECE | Common Extensible Cryogenic Engine |
| CERR | Critical Events Readiness Review |
| CEV | Crew Exploration Vehicle |
| CEVIS | Cycle Ergometer with Vibration Isolation and Stabilization |
| CEVLS | Crew Exploration Vehicle Launch Segment |
| CFE | Capillary Flow Experiment |
| CFM | Cubic Feet per Minute |
| CFM-2 | Candle Flames in Microgravity-2 |
| CFO | Chief Financial Officer |
| CG | Center of Gravity |
| CGBA | Commercial Generic Bioprocessing Apparatus |
| CGSE | Common Gas Supply Equipment |
| CHAINS | CHain Aggregation INvestigation by Scattering |
| CHESS | Condensing Heat Exchanger for Space Systems |
| CI | Counter-Intelligence |
| CIA | Chamber Insert Assembly |
| CIBS | Coalescence Inhibition of Bubbly Suspensions Experiment |
| CIO | Chief Information Office |
| CIR | Combustion Integrated Rack |
| CL | Contact Line |
| Clean-Flame | Field Effects of Gravity on Lean Premixed Turbulent Flames |
| CLiDE | Contact Line Dynamics Experiment |
| CLV | Crew Launch Vehicle |
| CM | Configuration Management |
| CM-2 | Combustion Module – 2 |
| CMT | Critical Mission Task |
| CNC | Condensation Nuclei Counter |
| COFC | Court of Federal Claims |
| CoFR | Certification of Flight Readiness |
| COLLIDE-2 | Collisions into Dust Experiment – 2 |
| Con Ops | Concept of Operations |
| COTR | Contracting Officer Technical Representative |
| COTS | Commercial-Off-the-Shelf |
| CP-2L | CVB/PHaSE-2/PCS-2/LFCA |
| CPAF | Cost Plus Award Fee |
| CPCI | Compact-Peripheral Component Interconnect |
| CPAF/IF | Cost Plus Award Fee / Incentive Fee |
| CPD | Capability Production Document |
| CPFF | Cost Plus Fixed Fee |
| CPM | Critical Path Method |
| CPU | Central Processor Unit |
| CR | Change Request |
| CRA | Continuing Resolution Authority |
| CRL | Countermeasure Readiness Levels |
| CRM | Continuous Risk Management |
| CRR | Crew Readiness Review |
| CRT | Contingency Response Technologies |
| CRWT | Containerless Ripple Wave Turbulence Experiment |
| CSA | Canadian Space Agency |
| CSD | Comparative Soot Diagnostics |
| CSD | Computer Services Division |
| CSFM | Cold Stowage Fleet Manager |
| CSI | CGBA Science Insert |
| CSLM | Coarsening in Solid-Liquid Mixtures |
| CSLM-2 | Coarsening of Solid-Liquid Mixtures-2 |
| CSM | Center for Space Medicine |
| CSMT | Cold Stowage Management Team |
| CTB | Cargo Transport Bag |
| CTC | Crew Training Coordinator |
| CTO | Chief Training Officer |
| CV | Cost Variance |
| CVB | Constrained Vapor bubble |
| CVIT | Common Video Interface Transmitter |
| CVIU | Common Video Interface Unit |
| CVX-2 | Critical Viscosity of Xenon-2 |
| CY | Calendar Year |
-D-
| DA | Digital Astronaut |
| DAA | Deputy Associate Administrator |
| DAD | Decision Action Diagram |
| DAFT | Dust and Aerosol measurement Feasibility Test |
| DAR | Defense Acquisition Regulation |
| DAU | Defense Acquisition University |
| DC | Direct Current |
| DCAM | Dynamic Contact Angle Measurement Experiment |
| DCE | Droplet Combustion Experiment |
| DCE-2 | Droplet Combustion Experiment-2 |
| DCM | Diagnostic Control Module |
| DCMA | Defense Contract Management Agency |
| DCR | Design Concept Review |
| DCS | Digital Camera System |
| DDCE | Dynamics of Droplet Combustion and Extinction Experiment |
| DECLIC | DEvice for the study of Critical LIquids and Crystallization |
| DFP | Data Flow Plan |
| DFRC | Dryden Flight Research Center |
| DID | Deliverable Item Document |
| DIMS | Digital Imagery Management System |
| DISC | Digital Imaging Star Camera |
| dlm | Downlink Manager |
| DLS | Daily Load Stimulus |
| DMB | Data Management Board |
| DMC | Data Management Coordinator (MSFC POIC Duty Position) |
| DMO | Command and Data Management Officer (GRC FCF Duty Position) |
| DMS | Data Management System |
| DO | Delivery Order |
| DoD | U.S. Department of Defense |
| DOP | Daily Operations Plan |
| DoS | U.S. Department of State |
| DOT | Department of Transportation |
| DP | Delivery Plan |
| DPC | Daily Planning Conference |
| DPIV | Digital Particle Imaging Velocimetry |
| DRD | Data Requirement Delivery |
| DRD | Data Requirements Document |
| DRFP | Draft Request for Proposal |
| DRM | Design Reference Mission |
| DS | Descent Stage |
| DSN | Deep Space Network |
| DSO | Detailed Science Objective |
| DSP | Digital Signal Processor |
| DSRC | Data System Routing and Configuration |
| DSS | Destination Surface Stage |
| DT-IAM | Diagnostic Technologies – Integrated Autonomous Medicine |
| DVD | Digital Video Disk |
-E-
| EA | Evolutionary Acquisition |
| EAC | Estimate at Completion |
| EAR | Export Administration Regulations |
| EC | Embedded Controller |
| ECL | Exercise Countermeasures Laboratory |
| ECLSS | Environmental Control and Life Support System |
| ECO | Engineering Change Order |
| ECP | Export Control Program |
| ECP | Exercise Countermeasures Project |
| ECR | Engineering Change Request |
| ECS | Environmental Control System |
| ECU | Electronics Control Unit |
| ECU | Environmental Control Unit |
| ECW | Emergency, Caution and Warning |
| EDCA | Entropically Driven Colloidal Assembly Experiment |
| EDL | Entry Descent and Landing |
| EDMS | Electronic Document Management System |
| EDR | European Drawer Rack |
| EDS | Enhanced Data System |
| EDS | Earth Departure Stage |
| EE | Electronics Enclosure |
| EEU | Environmental Electronics Unit |
| EGM | Electrostatics of Granular Materials Experiment |
| EGSE | Experiment Ground Support Equipment |
| EHR | Exploration Human Research |
| EHS | Enhanced HOSC System |
| EI | Entry Interface |
| EIA | Electronic Industries Association |
| EIRD | Exploration Investigation Requirements Document |
| ELC | EXPRESS Laptop Computer |
| ELM | Enhanced Light Microscope |
| ELV | Expendable Launch Vehicle |
| EM | Engineering Model |
| EMCS | Enhanced Mission Communications System |
| EMI | Electromagnetic Interference |
| EMO | Environmental Management Office |
| EMS | Environmental Management System |
| EMS | Experiment Mounting Structure |
| EO | Earth Orbit |
| EPCU | Electrical Power Control Unit |
| EPS | Electrical Power System |
| ER# | EXPRESS Rack number |
| ERB | Engineering Review Board |
| ERD | Engineering Requirements Document |
| ERE | Extensional Rheology Experiment |
| ES | Earth Surface |
| ESA | European Space Agency |
| ESC | Electronic Still Camera |
| ESC | Evaporative Spray Cooling |
| ESD | Exploration Systems Division |
| ESM | Equivalent System Mass |
| ESMD | Exploration Systems Mission Directorate |
| ESMD PARL | ESMD Performance Assessment Report Lead |
| ESMD PPL | ESMD Performance Planning Lead |
| ESMD SAMP | ESMD Single Acquisition Management Plan |
| ESMD SEMP | ESMD Theme Systems Engineering Management Plan |
| ESN | External Services Network |
| ESR&T | Exploration Systems Research & Technology Division |
| ESS | Exploration System of Systems |
| ESSA | EPCU Shutoff Switch Assembly |
| ETC | Estimate to Completion |
| ETM | Equipment Transfer Module |
| ETO | Earth-to-Orbit |
| ETOV | Earth-to-Orbit Vehicle |
| EV | Earned Value |
| EV | Entry Vehicle |
| EVA | Extra Vehicular Activity |
| EVM | Earned Value Management |
| EVMS | Earned Value Management System |
| EVP | Exhaust Vent Package |
| EWCA | Emergency, Warning, Caution, and Advisory |
| EXMC | Exploration Medical Capability and Digital Astronaut |
| EXPRESS | Expedite the Process of Experiments to the Space Station Rack |
| eZLS | Enhanced Zero-g Locomotion Simulator |
-F-
| FAD | Formulation Authorization Document |
| FAM | Familiarization (training) |
| FAR | Federal Acquisition Regulations |
| FCA | Functional Configuration Audit |
| FCF | Fluids and Combustion Facility |
| FDS | Functional Discipline Specialist |
| FEANICS | Flow Enclosure Accommodating Novel Investigations in Combustion of Solids |
| FFP | Firm Fixed Price |
| FFRDC | Federally Funded Research and Development Center |
| FHA | Flight Hardware Availability |
| FICS | FOMA Instrumentation Calibration System |
| FIR | Fluids Integrated Rack |
| FIST | Flammability Diagrams of Combustible Materials in Microgravity |
| FLEX | FLame Extinguishment eXperiment |
| Flt Platform | Flight 4.1.2 |
| FM | Functional Model |
| FMEA/CIL | Failure Mode Effects Analysis / Critical Item List |
| FMS | Food Management System |
| FO | Forward Osmosis |
| FOAM | Foam Optics and Mechanics Experiment |
| FOC | Full Operational Capability |
| FOIA | Freedom of Information Act |
| FOM | Figure-of-Merit |
| FOMA | Fuel Oxidizer Management Assembly |
| FOOT | Lower Extremity Monitoring Suit ISS Experiment |
| FPAF | Fixed Price Award Fee |
| FPC | Food Preparation Capabilities |
| FPDS | Fire Prevention, Detection, and Suppression |
| FPI | Fixed Price Incentive |
| FPSR | Fluid Physics Strategic Research |
| FRR | Flight Readiness Review |
| FSAP | Fluid Science Avionics Package |
| FSDP | Flight Safety Data Packages |
| FSL | Fluid Science Laboratory (ESA) |
| FSR | Flight safety Review |
| FU | Flight Unit |
| FunRes | Fundamental Research |
| FY | Fiscal Year |
-G-
| G&A | General and Administrative |
| GAO | General Accounting Office |
| GC | Gas Chromatograph |
| GCR | Galactic Cosmic Ray |
| GEL | Gravity Effects in Lyophilization |
| GERT | Graphical Evaluation Review Technique |
| GESS | GRC Engineering and Scientific Support |
| GFE | Government Furnished Equipment |
| GFM | Granular Flow Module |
| GGM | Gravity and Granular Materials, GFM-3 |
| GIU | Ground Interface Unit |
| GMSF | Growth and Morphology of Supercritical Fluids Experiment |
| GN&C | Guidance, Navigation and Control |
| GOTS | Government-Off-The-Shelf |
| GPD | Gate Product Deliverable |
| GPMC | Governing Program Management Council |
| GPRA | Government Performance and Results Act |
| GRADFLEX | Gradient Driven Fluctuations Experiment |
| GRC | Glenn Research Center |
| GSDP | Ground Safety Data Package |
| GSE | Ground Support Equipment |
| GSP | Ground Support Personnel |
| GSS | Ground Support System |
| GTP | Gas Tolerant Pump |
| GLIDE | Global Integrated Design Environment |
-H-
| HBCU | Historically Black Colleges and Universities |
| HCA | Head of Contracting Activity |
| HCL | Human Capitol Liaison |
| HCR | Hardware Concept Review |
| HFIT | Human Factor Integration Test |
| HIPPA | Hip Investigator for Protecting Astronaut Anatomy |
| HQ | Headquarters |
| HRIS | Human Resources Information System |
| HSR&T | Human Support Research Technology |
| HUB | Historically Underutilized Business |
-I-
| IA | Independent Assessment |
| IAO | International Announcement of Opportunity |
| IBPD | Integrated Budget and Performance Document |
| IBR | Integrated Baseline Reviews |
| ICA | Independent Cost Assessment |
| ICAT | Independent Cost Assessment Team |
| ICD | Interface Control Document |
| ICE | Independent Cost Estimate |
| ICE | Interface Configuration Experiment |
| ICP | Intramural Call for Proposal |
| ICR | Initial Confirmation Review |
| ICR | Investigation Continuation Review |
| ID | Incremental Development |
| IDD | Interface Definition Document |
| IEEE/EIA | Institute of Electrical and Electronics Engineers / Electronic Industries Association |
| IFB | Invitation for Bid |
| IGA | Inter-Governmental Agreement |
| IGCE | IIndependent Government Cost Estimate |
| ILS | Integrated Logistics Support |
| IMS | Integrated Master Schedule |
| InSPACE | Investigating the Structure of Paramagnetic Aggregates from Colloidal |
| InSPACE-2 | Investigating the Structure of Paramagnetic Aggregates from Colloidal – 2 |
| INSTEP | In-Space Technology Experiments Program |
| IOC | Initial Operational Capability |
| IOP | Input Output Package |
| IPA | Independent Program Assessment |
| IPAO | Independent Program Assessment Office |
| IPAT | Independent Program Assessment Team |
| IPO | Institutional Program Office |
| IPP | Innovative Partnerships Program |
| IPS | Integrated Program Summary |
| IPSU | Image Processing & Storage Unit |
| IPT | Integrated Product Team |
| IR | Infared |
| IRB | Internal Reference Base |
| IRD | Interface Requirements Document |
| iRED | Interim Resistive Exercise Device |
| IRR | Interim Research Review |
| IS3 | In-Space Support System |
| ISFR | In-Situ Fabrication and Repair |
| ISLSP | In-Situ Life Support Processes |
| ISO | International Organization for Standardization |
| ISRU | In-Situ Resource Utilization |
| ISS | International Space Station |
| IT | Information Technology |
| ITA | Independent Technical Authority |
| ITAR | International Traffic in Arms Regulations |
| IVA | Intravehicular Activity |
| IVGEN | Intra Venous Water GENeration |
| IV&V | Independent Verification and Validation |
-J-
| JAXA | Japanese Aerospace Exploration Administration |
| JIMO | Jupiter Icy Moon Orbiter |
| JIT | Joint Integration Test |
| JPL | Jet Propulsion Lab |
| JSC | Johnson Space Center |
-K-
| KA | Key Activities |
| KDP | Key Decision Point |
| KPP | Key Performance Parameters |
| KSC | Kennedy Space Center |
-L-
| LaRC | LaRC Langley Research Center |
| LAWG | LAWG Lunar Architecture Working Group |
| LCC | LCC Life Cycle Cost |
| L/D | L/D Lift/Drag coefficient |
| LED | LED Light Emitting Diode |
| LEO | LEO Low Earth Orbit |
| LEPAG | LEPAG Lunar Exploration Program Working Group |
| LExSWG | LExSWG Lunar Exploration Science Working Group |
| LFCA | LFCA Low Volume Fraction Colloidal Assemblies Experiment, LMM-4 |
| LF-X | LF-X Logistics Flight |
| LH2 | LH2 Liquid Hydrogen |
| LIS | LIS Lead Increment Scientist |
| LFCA | LFCA Low Volume Fraction Colloidal Assemblies Experiment, LMM-4 |
| LLO | LLO Low-Lunar Orbit |
| LME | LME Liquid Management Experiment |
| LMM | LMM Light Microscopy Module |
| LMS | LMS Lunar Mission Scenario |
| LO | LO Lunar Orbit |
| LOA | LOA Letter of Agreement |
| LOC | LOC Lunar Orbit Capture |
| LOE | LOE Level of Effort |
| LOM | LOM Loss of Mission |
| LOX | LOX Liquid OXygen |
| LRIP | LRIP Low-Rate Initial Production |
| LRL | LRL Lunar Robotic Lander |
| LRO | LRO Lunar Robotic Orbiter |
| LRR | LRR Launch Readiness Review |
| LS | LS Lunar Surface |
| LSAM | LSAM Lunar Surface Access Module |
| LSH | LSH Life Support and Habitation |
| LSI | LSI Landed Surface Interrogator |
| LSP | LSP Laminar Soot Process |
| LSPG | LSPG Life Support Power Generation System |
| L1 | Libration point 1 (Earth-Moon) |
-M-
| M&S | Modeling and Simulation |
| MABE | Microheater Array Boiling Experiment |
| MAMS | Microgravity Acceleration Measurement System |
| MCDL | Master Controlled Documents List |
| MDA | Milestone Decision Authority |
| MDCA | Multi-user Droplet Combustion Apparatus |
| MDCA | Mission System Development Implementation Plan |
| MEL | Microgravity Environment Lab |
| MEPAG | Mars Exploration Program Analysis Group |
| MFS | Multiphase Flow Separators |
| MFT | Multiphase Flow Technology |
| MGFA | Multi-user Gaseous Fuels Apparatus |
| MGI | MICROSCALE Glovebox Investigation Experiment |
| MGM-III | Mechanics of Granular Materials Experiment – III |
| MI | Minority Institutions |
| MIDAS | Miscible Interface Dynamics and Simulation Experiment |
| MIST | Water Mist Fire Suppression Experiment |
| MIUL | Material Identification Usage List |
| MMA | Microgravity Measurement Apparatus |
| MMOD | Micro-Meteoroid and Orbital Debris |
| MOA | Memorandum of Agreement |
| MOBI | Microgravity Observations of Bubble Interaction Experiment |
| MOMM | Microscopy and Optical Manipulation Module |
| MOP | Mission Operations Plan |
| MOTS | Modified-Off-The-Shelf |
| MOU | Memorandum of Understanding |
| MRDOC | Microgravity Research, Development and Operations Contract |
| MRR | Mission Readiness Review |
| MS | Milestone |
| MSCRE | Microgravity Smoldering Combustion Re-Flight Experiment |
| MSD | Microgravity Science Division |
| MSD | Mission System Development |
| MSFC | Marshall Space Flight Center |
| MSG | Microgravity Science Glovebox |
| MST | Mission Sequence Test |
| MWA | Maintenance Work Area |
| μMRF | Micromechanics of Magnetorheological Fluids, LMM-5 |
| μgSEG | Particle Segregation in Collisional Sheering Flows Experiment, GFM-1 |
| μSCALE | Microscale Hydrodynamics Near Moving Contact Lines Experiment |
| μSiGMA | Micro Solids Interacting with Gas in a Microgravity Apparatus Experiment, GFM-2 |
-N-
| N/A | Not Applicable |
| NAC | NASA Advisory Committee |
| NAR | Non-Advocate Review |
| NASA | National Aeronautics and Space Administration |
| NBX | Nucleate Boiling Experiment |
| NCMR | National Center for Microgravity Research (see NCSER) |
| NCRP | National Council on Radiation Protection |
| NCSER | National Center for Space Exploration Research (formerly NCMR) |
| NDI | Non-Developmental Items |
| NEDD | Natural Environments Definition for Design |
| NEP | Nuclear Electric Propulsion |
| NEPA | National Environmental Policy Act |
| NESC | NASA Engineering and Safety Center |
| NFS | NASA FAR Supplement |
| NGIT | Northrop Grumman, Information Technologies (MRDOC) |
| NIST | National Institute of Standards & Technology |
| NLSA | Nuclear Launch Safety Approval |
| NODIS | NASA Online Directives Information System |
| NP | NASA Publication |
| NPBX | Nucleate Pool Boiling under Microgravity Experiment |
| NPD | NASA Policy Directive |
| NPD | NASA Policy Documents |
| NPR | NASA Procedural Requirement (Document) |
| NRA | NASA Research Announcement |
| NRC | National Research Council |
| NSBRI | NSBRI |
| NSRS | NASA Safety Reporting System |
| NSSA | National Security Space Acquisition |
| NSSA | Nuclear Technology and Demonstrations |
| NTR | Nuclear Thermal Rocket |
| NWR | Not Worth Reporting |
-O-
| OAG | OAG Operations Advisory Group |
| OASIS | OASIS Observation and Analysis of Smetic Islands in Space, LMM-7 |
| OCE | OCE Office of the Chief Engineer |
| OCHMO | OCHMO Office of the Chief Health and Medical Officer |
| OCR | OCR Operations Change Request |
| OG | OG Over guide-line |
| OM | OM Orbital Module |
| OMB | OMB Office of Management and Budget |
| ORDT | ORDT Objectives and Requirements Definition Team |
| ORR | ORR Operations Readiness Review |
| ORU | ORU Orbital Replacement Unit |
| OSD | OSD Office of the Secretary of Defense |
| OSMA | OSMA Office of Safety and Mission Assurance |
| OSP | OSP Orbital Space Plane |
| OV | OV Operational View |
| OZ | NASA JSC ISS Payload Integration Office |
-P-
| PA&E | Program Analysis and Evaluation |
| PAH | Payload Accomodations Handbook |
| PAP | Product Assurance Plan |
| PAPAC | Provide Aerospace Products and Capabilities |
| PAR | Performance and Accountability Report |
| PaRIS | Passive Pack Isolation System |
| PARL | Performance and Accountability Reporting Lead |
| PARS | Payload Anomoly Report System |
| PART | Program Assessment Rating Tool |
| PAS | Passive and Active Gas-Liquid Separator Devices |
| PASEP | Passive and Active Phase Separators |
| PASLB | Passive Acoustic Stabilization of Liquid Bridges Experiment |
| PBM-1 | Pool Boiling Module-1 |
| PBMA | Process Based Mission Assurance |
| PBRE | Packed Bed Reactor Experiment |
| PBS | President’s Budget Submission |
| PBS | Product Breakdown Structure |
| PC PCA | Plane Change Program Commitment Agreement |
| PCAD | Propulsion and Cryogenic Advanced Development |
| PCB | Program / Project Control Board |
| PCE | Particulate Control Experiment |
| PCS | Physics of Colloids in Space Experiment, LMM-3 |
| PCS+ | Physics of Colloids in Space Experiment Plus |
| PCS-2 | Physics of Colloids in Space Experiment-2 |
| PCS-3 | Physics of Colloids in Space-3 |
| PD | Payload Developer |
| PDE | Pulsed Thermal Loop Demo |
| PDL | Payload Data Library |
| PDR | Preliminary Design Review |
| PDS | Planetary Data System |
| PERT | Program Evaluation Review Technique |
| PESHE | Programmatic Environmental, Safety, and Occupational Health Evaluation |
| PHaSE-2 | Photo-Flight Model |
| OASIS | Physics of Hard Spheres Experiment-2, LMM-2 |
| PI | Principal Investigator |
| PIA | Payload Integration Agreement |
| PIDS | Principal Investigator Data Service |
| PIM | Payload Integration Manager |
| PIMS | Principal Investigator Microgravity Services |
| PIRN | Preliminary Interface Revision Notice |
| PKE | Plasma Krystal Experiment |
| PLAR | Post-Launch Assessment Review |
| PMA | President’s Management Agenda |
| PMB | Performance Measurement Baseline |
| PMC | Program management Council |
| PMDP | Project Management Development Process |
| PMF | Propellant Mass Fraction |
| PMIT | Program Manger’s Handbook |
| PMIT | Payload Mission Integration Team |
| PNAR | Preliminary Non-Advocate Review |
| POC | Point of Contact |
| POIC | Payload Operations & Integration Center |
| POIWG | Payload Operations & Integration Working Group |
| POP | Program Operating Plan |
| PP-SLD | Passive Pneumatic Subject Load Device |
| PPL | Performance Planning Lead |
| PRACA | Preventive and Corrective Action |
| PRA | Probabilistic Risk Assessments |
| PRD | Program Requirements Document |
| P-SLD | Pneumatic Subject Load Device |
| PSR | Pre-Ship Review |
| PSRP | Payload Safety Review Panel |
| PSTR | Pre-Storage Review |
| PStR | Pre-Storage Review |
| PTDR | Payload Training Dry Run |
| PTR | Payload Technical Review |
| PV | Process Verification |
| PWP | Primary Water Processor |
| PY | Program Year |
-Q-
| QA | QA Quality Assurance |
| QFD | QFD Quality Function Deployment |
-R-
| R&T | Research and Technology |
| R&TD | Research and Technology Development |
| RCAR | Requirements Change Assessment Report |
| RCR | Research Concept Review |
| RDR | Requirements Definition Review |
| RED | Resistive Exercise Device |
| REEFS | Radiative Enhancement Effects on Flame Spread |
| RFA | Request for Action |
| RFI | Request for Information |
| RFP | Request for Proposal |
| RFQ | Request for Quote |
| RGF,GFM-4 | Regimes of Granular Flow |
| RID | Review Item Discrepancy |
| RLEP | Robotic Lunar Exploration Program |
| RMB | Risk Management Board |
| RMSAG | Risk and Mission Success Advisory Group |
| RO | RO |
| RP-1 | Rocket Propellant 1 |
| RPS | Robotic Precursor System |
| RPWG | Research Payload Working Group |
| RTIP | Research and Technology Implementation Plan |
| RTM | Research Team Member |
| RTS | Remote Triaxial Sensor |
| RTSAD | Risk Tool Suite for Advanced Design |
| RWGS | Reverse Water Gas Shift |
-S-
| S&MA | Safety and Mission Assurance |
| S/C | Spacecraft |
| SAME | Smoke Aerosol Measurement Experiment |
| SAMP | Single Acquisition Management Plan |
| SAPIAD | Space Science Pending International Agreement Database |
| SAMS | Space Acceleration Measurement System |
| SAR | Shared Accommodations Rack |
| SARG | Standard Assurance Requirements and Guidelines |
| SBA | Simulation Based Acquisition |
| SBIR | Small Business Innovative Research |
| SCMP | Soft Condensed Matter Physics |
| SCR | Science Concept Review |
| SCWO | Super Critical Water Oxidation |
| SDL | Structural Dynamics Laboratory |
| SDP | Safety Data Package |
| SDR | System Design Review |
| STDO | Station Development Test Objective |
| SDTO | Science Detailed Test Objective |
| SDVOSB | Service Disabled Veteran Owned Small Businesses |
| SE | Systems Engineer |
| SE&I | Systems Engineering and Integration |
| SEB | Source Evaluation Board |
| SEDC | Sooting and Radiation Effects in Droplet Combustion Experiment |
| SEMP | Systems Engineering Management Plan |
| SEP | Gas-liquid Separator Experiment |
| SEP | Liquid-Gas Separator Experiment |
| SEP | Solar Proton Event |
| SESCDP | Senior Executive Service Candidate Development Program |
| S-FLAME | Structure and Response of Spherical Diffusion Flames |
| SHERE | Shear History Extensional Rheology Experiment |
| SIBAL | Solid Inflammability Boundary at Low-Speed |
| SICD | Spiral Initial Capabilities Document |
| SiGMA | Gas-Particle Interactions in a Microgravity Flow Cell |
| SLB | Stabilization of Liquid Bridges |
| SLD | Subject Load Device |
| SMA | Safety and Mission Assurance |
| SMARR | Safety and Mission Assurance Readiness Review |
| SMARTS | Safety and Mission Assurance Requirements Tracking System |
| SMD | Science Mission Directorate |
| SMO | System Management Office |
| SMOKE | Characterization of Smoke Particulate for Spacecraft Fire Detection |
| SOFBALL | Structure of Flame Balls at Low Lewis-numbers |
| SOLAR | Site for Online Learning and Resources |
| SOMD | Space Operations Mission Directorate |
| SOW | Statement of Work |
| SPAWG | Space Communications Analysis Working Group |
| SPE | Solar Particle Event |
| SPICE | Smoke Points in Co-flow Experiment |
| SPU | Sample Processing Unit |
| SRD | Systems Requirements Documents |
| SRFE | Smart Fluid Rheology |
| SRM&QA | Safety, Reliability, Maintainability and Quality Assurance |
| SRR | System Requirements Review |
| SS | Systems-of-Systems |
| SSAA | System Security Authorization Agreement |
| SSAS | Space System Acquisition Strategy |
| SSC | Stennis Space Center |
| SSPIAD | Space Science Pending International Agreements Database |
| SSTAC | Space Science and Technology Advisory Committee |
| STD | Standard (Document) |
| STES | Single-locker Thermal Enclosure System |
| STTP | Strategy to Task to Technology Process (or Panel) |
| STTR | Small Business Technology Transfer |
| SV | Schedule Variance |
| SV | System View |
| SVTL | Safety Verification Tracking Log |
| SWMS | Solid Waste Management System |
| sZLS | Standalone Zero-g Locomotion Simulator |
-T-
| T&E | Test & Evaluation |
| T | Tank (NTR staging tank) |
| T2 | Second ISS Treadmill |
| TBD | To Be Decided |
| TBD | To Be Determined |
| TBR | To Be Resolved |
| TC | Thermal Control |
| TCPI | To Complete Performance Index |
| TDRSS | Tracking and Data Relay Satellite System |
| TEI | Trans-Earth Injection |
| TEM | Transmission Electron Microscope |
| TEMP | Test and Evaluation Management Plan |
| TEMP | Test and Evaluation Master Plan |
| TIGER-3D | Transition from Ignition to Flame Growth under External Radiation in Three Dimensions |
| TIM | Technical Interchange Meetings |
| TLI | Trans-Lunar Injection |
| TΦFFy | Two-Phase Flow Facility |
| TO | Trade Option |
| TOC | Total Ownership Cost |
| TPFE | Two-Phase Flow Experiment |
| TPHT | Two-Phase Heat Transfer |
| TPM | Technical Performance Measurement |
| TPM ALS | Two-Phase Modeling |
| TPS | Thermal Protection System |
| TRL | Technology Readiness Level |
| TRP | Transition Research Projects |
| TS | Thermal Systems |
| TSC | TeleScience Center |
| TSH-ES | Triaxial Sensor Head-Ethernet Standalone |
| TV | Technical View |
| TVIS | Treadmill with Vibration Isolation and Stabilization |
| TVR | Test and Verification Review |
| TWH | Technical Warrant Holders |
-U-
| UF-X | Utility/Utilization Flight |
| ULF | UtiLization Flight |
| UML | Universal Mounting Location |
| UMMC | University of Mississippi Medical Center |
| UPN | Unique Project Number |
| URL | Uniform Resource Locator |
| UTMB | University of Texas Medical Branch |
| UVIS | Ultraviolet-Visible-Infrared Spectrophotometer |
-V-
| VAR | VAR Variance Analysis Report |
| VCD | VCD Vapor Compression Distillation |
| VE | VE Value Engineering |
| VLA | VLA Vehicle Loads Analysis |
| VOSB | VOSB Veteran-Owned Small Business |
| VPCAR | VPCAR Vapor Phase Catalytic Ammonia Reactor |
| VPERD | VPERD Verification Plan and Engineering Requirements Document |
| VRR | VRR Verification Readiness Review |
| VTL | VTL Verification Tracking Log |
-W-
| WBS | Work Breakdown Structure |
| WCD | Workforce Competency Dictionary |
| WFCA | Water Flow Control Assembly |
| WFI | Water for Injection |
| WONDER | Water Offset Nutrient Delivery Experiment |
| WOSB | Woman Owned Small Businesses |
| WP | Water Processor |
| WR | Water Reclamation |
| WRS | Water Recovery System |
-X-
| XML |
-Y-
| NONE |
-Z-
| ZBOT | ZBOT Zero Boil-Off Tank Project |
| ZBR | ZBR Zero Base Review |
| ZGF | ZGF Zero Gravity Facility |
| ZIN | ZIN ZIN Technologies |