ACRONYM |
DEFINITION |
CONTRIBUTOR |
O & C |
Operations and Control |
CASI |
O&GS |
Operations and Ground System
(Project) |
Goddard |
O&M |
Operations and Maintenance |
Goddard |
O/O |
On/Off |
Goddard |
O/PM |
Output Module |
Goddard |
O/V |
Over Voltage |
Goddard |
OA |
Office Automation |
Goddard |
OA |
Operations Agreement |
Goddard |
OA |
Operations Astronomer |
Goddard |
OA |
NASA Office of the Administrator |
CASI |
OA |
Office of Applications |
CASI |
OACSIDA |
Office of the Assistant Chief
of Staff for Intelligence, Dept. of the Army,
Washington, DC |
CASI |
OAF |
Optical Alignment Facility |
Goddard |
OAG |
Official Airline Guide |
Langley |
OAI |
Ohio Aerospace Institute |
Goddard |
OAI |
Open Archives Initiative (interoperability
standards for online documents) |
CASI |
OAO |
Orbiting Astronomical Observatory |
CASI |
OAO 3 |
Copernicus Observatory |
CASI |
OAOAF |
Operations Analysis Office, Air
Force, Washington, DC |
CASI |
OAOAFLC |
Operations Analysis Office, Air
Force Logistics Command, Wright-Patterson Air
Force Base, OH |
CASI |
OARE |
Orbital Acceleration Research
Experiment |
CASI |
OART |
Office of Advanced Research and
Technology |
CASI |
OASES |
Outpost for the Analysis and
Spectroscopy of ExoPlanetary Systems |
CASI |
OASIS |
Office Automation and Systems
Improvement Standards |
Goddard |
OASIS |
Operations and Science Instrument
Support (U of Colorado s/w) |
Goddard |
OASIS |
OEX Autonomous Supporting Instrumentation
System |
CASI |
OASPL |
Overall Sound Pressure Level |
CASI |
OAST |
Office of Aeronautics and Space
Technology |
CASI |
OASTFLYER |
Office of Aeronautics and Space
Technology-Flyer |
CASI |
OASYS |
Orbit Analysis System |
Goddard |
OAT |
Orbit Adjust Thrusters |
CASI |
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OB |
Optical Bench |
Goddard |
OB |
Octave Band |
CASI |
OBAS |
Optical Bench Alignment System |
Goddard |
OBASS |
Optical Bench Alignment Support
Structure |
Goddard |
OBC |
On-Board Computer |
Goddard |
OBCTE |
On-Board Computer Test Equipment |
Goddard |
OBDH |
On-Board Data Handling |
Goddard |
OBDHTE |
On-Board Data Handling Test Equipment |
Goddard |
OBDI |
On-Board Decoder Interface |
Goddard |
OBDS |
On-Board Decoder Simulator |
Goddard |
OBE |
On-Board Equivalent |
Goddard |
OBE |
Optical Bench Enclosure |
Goddard |
OBETC |
Optical Bench Enclosure Thermal
Control |
Goddard |
OBFM |
On-Board Fault Management |
Goddard |
OBP |
On-Board Processor |
Goddard |
OBPR |
Office of Biological and Physical
Research |
CASI |
OBR |
Outer Boot Ring |
CASI |
OBS |
Organization Breakdown Structure |
Langley |
OBS |
Operational Bioinstrumentation
System (Space Shuttle) |
CASI |
OBSS |
Orbiter Boom Sensor System |
CASI |
OC |
Oversite Committee |
Langley |
OCA |
Optical Company of America |
Goddard |
OCA |
Oceanic Control Areas |
CASI |
OCC |
Operations Control Center |
CASI |
OCD |
Operating Control Directive |
Goddard |
OCD |
Operations Concept Document |
Goddard |
OCE |
Optical Control Electronics |
Goddard |
OCE-EK |
Optical Control Electronics-Enhancement
Kit |
Goddard |
OCF |
Operational Control Field |
Goddard |
OCI |
Ocean Color Imager |
CASI |
OCLC |
Online Computer Library Center |
Langley |
OCLI |
Optical Coatings Laboratory,
Inc. |
Goddard |
OCMIP |
Ocean Carbon-cycle Model Intercomparison
Project |
Goddard |
OCP |
Office of Commercial Programs
(NASA) |
CASI |
OCPP |
Orbiter Cloud Photopolarimeter
(Pioneer) |
CASI |
OCR |
Operational Control Room |
Goddard |
OCR |
Optical Character Reader |
Langley |
OCR |
Optical Character Recognition |
CASI |
OCS |
Ocean Color Scanner |
Langley |
OCS |
Optical Control Subsystem |
Goddard |
OCT |
Octave |
Langley |
OCTS |
Ocean Color and Temperature Scanner |
CASI |
OCTW |
Optical Communication Thru the
Shuttle Window Flight Demonstration |
CASI |
OCXO |
Oven-Controller Crystal Oscillator |
Goddard |
OD |
Operational Downlink |
Goddard |
OD |
Operations Directives |
Goddard |
OD |
Operations Director |
Goddard |
OD |
Optical Disk |
Goddard |
OD |
Orbit Determination |
Goddard |
ODA |
Open Document Architecture |
CASI |
ODAS |
Ocean Data Acquisition Systems |
Langley |
ODB |
Operations Database |
Goddard |
ODC |
Other Data Center |
CASI |
ODC |
Other Direct Costs |
CASI |
ODC |
Ozone Depletion Compound |
CASI |
ODE |
Orientation Drive Electronics |
Goddard |
ODE |
Ordinary Differential Equation |
CASI |
ODF |
Orbit Determination Facility |
Goddard |
ODIN |
Outsourcing Desktop Initiative
for NASA |
Goddard |
ODM |
Operational Data Message |
Goddard |
ODM |
Optical Detector Subsystem |
Goddard |
ODR |
Optical Data Recorder |
Goddard |
ODS |
Orbit Determination System |
Goddard |
ODSRS |
Orbiting Deep Space Relay Station |
CASI |
ODTC |
Office of Defense Trade Controls |
Goddard |
ODU |
Old Dominion University |
Langley |
ODUS |
Ozone Dynamics Ultraviolet Spectrometer |
Goddard |
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OE |
NASA Office of Exploration |
CASI |
OEA |
OEA Aerospace (company) |
Goddard |
OECO |
Outboard Engine Cutoff |
CASI |
OEF |
Operations Evaluation Group,
Office of Naval Operations |
CASI |
OEIC |
Opto-Electronic Integrated Circuit |
CASI |
OEM |
Original Equipment Manufacturer |
Goddard |
OEOP |
Office Equal Opportunity Program |
Goddard |
OES |
Office of Earth Science |
Goddard |
OEX |
Orbiter Experiments |
CASI |
OFAD |
Optical Field Angle Distortion |
Goddard |
OFHC |
Oxygen-Free, High-Conductivity
(Copper) |
CASI |
OFP |
Operational Flight Plan |
CASI |
OFPP |
Office of Federal Procurement
Policy |
Goddard |
OFT |
Orbital Flight Test |
CASI |
OFT |
Orbiter Flight Test |
CASI |
OFTT |
Operational Flight and Tactics
Trainer |
CASI |
OGCM |
Ocean General Circulation Model |
Goddard |
OGO |
Orbiting Geophysical Observatory |
CASI |
OGSE |
Optical Ground Support Equipment |
Goddard |
OH |
Hydroxyl radical |
Goddard |
OHA |
Operations Hazard Analysis |
Goddard |
OHSEB |
Occupational Health and Safety
Executive Board |
Goddard |
OI |
Operational Instrumentation (Space
Shuttle) |
CASI |
OIATU |
Office of Industry Affairs and
Technology Utilization |
CASI |
OIG |
Office of Inspector General |
Goddard |
OIG |
Orbital Information Group |
Goddard |
OIM |
Oxygen Interaction with Materials |
CASI |
OIRA |
Office of Information and Regulatory
Affairs |
Goddard |
OIS-D |
Operational Intercommunication
System - Digital |
Goddard |
OIS-Q |
Quintron OIS |
Goddard |
OKID |
Observer/Kalman filter Identification |
CASI |
OLCAS |
On-line Cost Accruals System |
Goddard |
OLCAS |
On-Line COSTAR Alignment System |
Goddard |
OLD |
Off-Load Device |
Goddard |
OLD |
Operations Limitation Document |
Goddard |
OLE |
Object Linking and Embedding |
CASI |
OLMSA |
Office of Life and Microgravity
Sciences and Applications |
Goddard |
OLP |
Off-Line Processor |
Goddard |
OLPS |
Open Literature Processing System |
CASI |
OLR |
Outgoing Longwave Radiation |
Langley |
OLR |
Outgoing Long-Wave Radiation |
Langley |
OLS |
On-Line System |
Goddard |
OLS |
Operational Linescan System |
Goddard |
OLS |
Orbital Launch Services |
Goddard |
OLS |
Optical Line Scanner |
CASI |
OLT |
Observatory Level Test |
Goddard |
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OM |
Operations Manager |
Goddard |
OM |
Optical Model |
Goddard |
OM |
Optics Module |
Goddard |
OMA |
Office of Minority Affairs |
Goddard |
OMA |
Optomechanical Assembly |
Goddard |
OMB |
Office of Management and Budget |
CASI |
OMDC |
Orbital Meteoroid and Debris
Counting |
Langley |
OMEGA |
Office of the MAP Experiment
General Archive |
Goddard |
OMEI |
Other Minority Education Institutions |
Goddard |
OMG |
Object Management Group |
Goddard |
OMI |
Ozone Monitoring Instrument |
CASI |
OMIS |
Optical Multi-channel Imaging
Sensor |
Goddard |
OMPS |
Ozone Mapper and Profiler Suite |
Goddard |
OMS |
Observatory Monitoring System |
Goddard |
OMS |
Orbital Maneuvering System |
CASI |
OMSF |
Office of Manned Space Flight |
CASI |
OMT |
Orthomode Transducer |
Goddard |
OMU |
Other Minority Universities |
Goddard |
OMV |
Orbital Maneuvering Vehicle |
CASI |
OMVPE |
Organo-metallic Vapor Phase Epitaxy |
CASI |
ONA |
On-Line Archive |
Goddard |
ONERA |
Office National d’Etudes et de
Recherché Aerospatiales |
CASI |
ONI |
Office of Naval Intelligence,
Washington, DC |
CASI |
ONLS |
On-Line System |
Goddard |
ONR |
Office of Naval Research, Washington,
DC |
CASI |
ONRL |
Office of Naval Research, London |
CASI |
ONS |
Onboard Navigation Systems |
CASI |
OOE |
Out-of-Elliptic |
CASI |
OOL |
Out of Limits |
Goddard |
OOM |
On-Orbit Maintenance |
Goddard |
OOMA |
Object-Oriented Modular Approach |
Goddard |
OOPS |
On-Line Operating Plan System |
Goddard |
OOS |
Orbitto-Orbit Stage |
CASI |
OOT |
Out of Tolerance |
Goddard |
OP |
Operating Procedure |
Goddard |
OP |
Orbit Prediction |
Goddard |
OPA |
NASA Office of Public Affairs |
CASI |
OPAC |
On-line Patron Catalog |
Langley |
OPAC |
Online Public Access Catalog |
CASI |
OPB |
Out of Plane Bending |
Goddard |
OPD |
Operations Department of ST Sci |
Goddard |
OPD |
Optical Path Difference |
Goddard |
OPE |
ORU Protective Enclosure |
Goddard |
OPE |
One Pion Exchange |
CASI |
OPEN |
Origins of Plasmas in the Earth's
Neighborhood |
CASI |
OPEP |
Orbit Plane Experiment Package
(for use on OGO) |
CASI |
OPF |
Official Personnel Folder |
Goddard |
OPF |
Orbiter Processing Facility |
CASI |
OPIS |
Operational Satellite Improvement
Program |
CASI |
OPLE |
Omega Position Location Equipment |
CASI |
OPM |
Office of Personnel Management
(Previously, Civil Service Commission) |
CASI |
OPM |
Operations Message |
Goddard |
OPM |
Optical Properties Monitor |
CASI |
OPMI |
Output Module Interface |
Goddard |
OPMIS |
Optical Propulsion Management
Interface System |
CASI |
OPO |
Office of Public Outreach |
Goddard |
OPO |
Operations Order |
Goddard |
OPR |
Office of Primary Responsibility |
Goddard |
OPS |
Operations |
Langley |
OPT |
Office of Telecommunications
Policy |
CASI |
OPUS |
OSS-PODPS Unified System |
Goddard |
OPUS |
Organization of Persistent Upwelling |
CASI |
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OR |
Operations Room |
Goddard |
OR |
Ordinary Proton (Event) |
CASI |
OR |
Operations Requirements |
Goddard |
OR |
Observed Ratio |
CASI |
ORA |
Office of Research Analyses,
Holloman Air Force Base, NM |
CASI |
ORA |
Optical Research Associates |
Goddard |
ORBCOMM FM |
System of Commercial Communications
Satellites |
Goddard |
ORBIs |
Orbiting Radio Bearer Ionospheric
Satellite |
CASI |
ORD |
Operations Requirements Document |
Goddard |
ORDLEC |
Ohio River Div. Labs., Engineer
Corps, Cincinnati |
CASI |
OREX |
Orbital Reentry Experiment |
CASI |
ORF |
Orbital Reference Frame |
Goddard |
ORFEUS |
Orbiting and Retrievable Far
and Extreme Ultraviolet Spectrometer |
CASI |
ORGEL |
Organic Cooled, Heavy Water Moderated
Reactor (Euratom) |
CASI |
ORI |
Orbital Replacement Instrument |
Goddard |
ORI |
ORI Incorporated |
Goddard |
ORIC |
Oak Ridge Isochronous Cyclotron |
CASI |
ORION |
Operational Radio Interferometry
Observing Network |
CASI |
ORM |
Optical Reference Measurement |
Goddard |
ORNL |
Oak Ridge National Laboratory
(DAAC) |
Goddard |
ORR |
Operational Readiness Review |
Goddard |
ORR |
Orroral Valley, Australia GSTDN
Tracking Station |
Goddard |
ORS |
On-line Reprogramming System |
Goddard |
ORS |
Orbiter Refueling System |
CASI |
ORU |
Orbital Replacement Unit |
CASI |
ORUC |
ORU Carrier |
Goddard |
OS |
Operating System |
Goddard |
OSC |
Operations Support Center |
Goddard |
OSC |
NASA Office of Space Communications |
CASI |
OSC |
Orbital Sciences Corporation |
CASI |
OSCAR |
Orbiting Satellite Carrying Amateur
Radio |
CASI |
OSCIR |
University of Florida Infrared
Camera and Spectrometer |
Goddard |
OSD |
Operations Support Directive |
Goddard |
OSD |
Optical Surrogate Detector |
Goddard |
OSDBU |
Office of Small and Disadvantaged
Business Utilization |
Goddard |
OSDR |
Operational Sensor Data Record |
Goddard |
OSE |
Operational Support Equipment |
CASI |
OSEAS |
OEX Systems Engineering Support |
Langley |
OSEMA |
Office of Safety, Environmental,
and Mission Assurance |
Goddard |
OSF |
Office of Space Flight (NASA
HQ) |
Goddard |
OSF |
NASA Office of Space Flight |
CASI |
OSHA |
Occupational Safety and Health
Act |
Goddard |
OSHA |
Occupational Safety and Health
Administration |
Goddard |
OSI |
Open Systems Interconnection |
Goddard |
OSIP |
Operational Suitability Improvement
Program (Aviation) |
Langley |
OSL |
OTA Simulator Built by LAS (Marseilles) |
Goddard |
OSL |
Orbiting Solar Laboratory |
CASI |
OSM |
Office of Safety and Mission
Assurance |
Goddard |
OSM |
Optical Selector Mechanism |
Goddard |
OSMA |
Office of Safety and Mission
Assurance |
Goddard |
OSO |
Office of Space Operations |
Goddard |
OSO |
Orbiting Solar Observatory |
CASI |
OSP |
Orbital Space Plane |
CASI |
OSRS |
Orbital Structural Reference
System |
Goddard |
OSS |
Office of Space Science (NASA) |
CASI |
OSS |
Office of Space Station (NASA) |
CASI |
OSS1 |
Office of Space Science 1 |
CASI |
OSSA |
Office of Space Science and Applications |
CASI |
OSSD |
NASA Office of Space Systems
Development |
CASI |
OSSE |
Observing System Simulation Experiment |
CASI |
OSSE |
Oriented Scintillation Spectrometer
Experiment (on GRO) |
Goddard |
OSSMA |
Office of Systems Safety and
Mission Assurance |
Goddard |
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OST |
Observational Sequence Table |
Goddard |
OSTA |
NASA Office of Space and Terrestrial
Applications (Now OAST) |
CASI |
OSTDS |
Office of Space Tracking and
Data Systems |
Goddard |
OSTP |
Office of Science and Technology
Policy |
CASI |
OSU |
Optical Stimulation Unit |
Goddard |
OSU |
Oregon State University |
Goddard |
OSWD |
Office of Special Weapons Developments,
Fort Bliss, TX |
CASI |
OTA |
Optical Telescope Assembly |
Goddard |
OTAE |
Other Technical Assets Employed |
Goddard |
OTAS |
Optical Telescope Assembly Simulator |
Goddard |
OTB |
Orbiter Timing Buffer (Space
Shuttle) |
CASI |
OTD |
Optical Transient Detector |
Goddard |
OTDA |
Office of Tracking and Data Acquisition |
CASI |
OTDR |
Optical Time Domain Reflectometer |
Goddard |
OTE |
Observing Time Estimator |
Goddard |
OTEF |
Operational Test and Evaluation
Force, Norfolk, VA |
CASI |
OTF |
Optical Transfer Function |
CASI |
OTF |
Optimum Traffic Frequency |
CASI |
OTFC |
On-the-Fly Calibration |
Goddard |
OTM |
Orbital Transfer Maneuver |
Goddard |
OTMM |
Observatory Thermal Math Model |
Goddard |
OTS |
Orbital Tracking Station |
Goddard |
OTS |
Outer Thermal Shield |
Goddard |
OTS |
Orbit Transfer System |
CASI |
OTSR |
Optimum Track Ship Routing |
Langley |
OTTER |
Oregon Transect Terrestrial Ecosystem
Research |
Goddard |
OTU |
Office of Technology Utilization |
CASI |
OTV |
Orbit Transfer Vehicle (Propulsive
rocket or stage to supplant IUS and SSUS) |
CASI |
OUSD |
Oakland Unified School District |
Goddard |
OV |
Observatory Verification |
Goddard |
OV |
Orbital Verification |
Goddard |
OVC |
Optimized Valence Configuration
(Quantum chemistry) |
CASI |
OVCS |
Outer Vapor Cooled Shield |
Goddard |
OVNI |
(French Acronym for UFO's) |
CASI |
OVRO |
Owens Valley Radio Observatory |
Goddard |
OWBPA |
Older Workers Benefit Protection
Act of 1990 |
Goddard |
OWL |
Orbiting Wide-angle Light collector |
Goddard |
OWL |
One Way Landers |
CASI |
OWS |
Optical Witness Sample |
Goddard |
OWS |
Orbiting Workshop |
CASI |
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