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Acronyms
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
| O COURSE | Obstacle Course |
| O&M | Operation and Maintenance |
| O&M | Operations and Maintenance |
| O&MN | Operations and Maintenance Navy |
| O&NM | Operations and Network Management working group |
| O&P | Ordering and Provisioning |
| O&S | Operating and Support |
| O&S | Operations and Support |
| O&S | Operations and Sustainment |
| O&SHA | Operating and Support Hazard Analysis |
| O-Level | Organizational Level |
| O-O | Object Oriented |
| O-O-O | Out Of Order Execution |
| O/E | Optical/Electrical converter |
| O/G | Outgoing |
| o/p | Output |
| OA | Objective Area |
| OA | Obligation Authority |
| OA | Offensive Action |
| OA | Office Automation |
| OA | Operational Architecture |
| OA | Operational Assessment |
| OA | Out of Action |
| OA&M | Operations, Administration, and Maintenance |
| OA&TP | Objective Architecture and Transition Plan |
| OAA | On Air Activation |
| OAA | Operational Assessment Analysis |
| OAA | Over Air Addressing |
| OAAW | Offensive Anti-Air Warfare |
| OAC | Oceanic Area Control Center |
| OAC | Objective Assignment Chart |
| OADM | Optical Add/Drop Multiplexer |
| OADR | Originating Agency’s Determination Required |
| OAF | Open Architecture Framework |
| OAG | Official Airline Guide |
| OAGI | Open Applications Group |
| OAGIS | Open Applications Group Integration Specification |
| OAI | Open Application Interface |
| OAI | Open Applications Interface |
| OAM | Operation and Maintenance |
| OAM | Operations, Administration, and Maintenance |
| OAM&P | Operations, Administration, Maintenance & Provisioning |
| OAML | Oceanic & Atmospheric Master Library |
| OAML | Oceanographic and Atmospheric Master Library |
| OAN | Optical Access Network |
| OAP | One step Approval Procedure |
| OAS | Offensive Air Support |
| OAS | Office Automation System |
| OAS | Office of Assistant Secretary |
| OAS | Organization of American States |
| OASD | Office of the Assistant Secretary of Defense |
| OASIS | Operations Analysis and Simulation Interface System |
| OASIS | Organization for the Advancement of Structured Information Standards |
| OASN | Office of the Assistant Secretary of the Navy |
| OAT | Optional Auxiliary Terminal. The OAT may be in the form of a CRT/Keyboard device capable of interfacing with other sources of data on the aircraft and supplying data to a hard copy printer. (Used in an ACARS system.) |
| OAT | Outside Air Temperature. The uncorrected reading of the outside temperature gauge. Different types of gauges require different correction factors to obtain static air temperature. |
| OAT | Operational Air Traffic |
| OAT | Outside Air Temperature |
| OATS | Office Automation Technology and Services (FAA) |
| OATS | Office Automation and Technology Services |
| OATS | Over-the-Air Activation TeleService |
| OATV | Open Architecture Television |
| OAWR | Over and Above Work Request |
| OB | Operating Budge |
| OB | Operating Budget |
| OB | Order of Battle |
| OBA | Oxygen Breathing Apparatus |
| ObAM | Object Action Manager |
| OBATS | Off-Board Augmented Theater Surveillance |
| OBE | Overcome By Events |
| OBEX | Object Exchange Technology |
| OBIGGS | On-Board Inert Gas Generating System |
| OBIGGS | Onboard Inert Gas Generating System |
| Obj | Objective |
| OBM | Orbital Ballistic Missile |
| OBMC | Overlapped Block Motion Compensation |
| OBOGS | On-Board Oxygen Generation System |
| OBOGS | Onboard Oxygen Generating System |
| OBP | On-Board Processing |
| OBP | Optimized Business Process |
| OBS | Omni bearing Selector. A panel instrument which contains the controls and circuits to select an omni bearing and determine the TO-FROM indication. |
| OBS | Optical Bypass Switch |
| obs. | Obsolete |
| OBT | On Board Training |
| OBU | OSIS Baseline Upgrade |
| OC | Office and Communication module |
| OC | Officer Commanding |
| OC | Operation Channel |
| OC | Operations Center |
| OC | Optical Carrier |
| OC-12 | Optical Carrier Network Transmission speed of 622 Mb/s |
| OC-3 | Optical Carrier Network Transmission speed of 155 Mb/s |
| OC-ALC | Oklahoma City - Air Logistics Center |
| OCA | Oceanic Area |
| OCA | Offensive Counter Air |
| OCA | Operational Control Authority |
| OCA/DCA | Offensive Counter Air/Defensive Counter Air |
| OCAP | OpenCable Applications Platform |
| OCC | Other Common Carrier |
| OCCA | Open Cooperative Computing Architecture |
| OCCS | Overall Construction Classification System |
| OCD | Operational Concept Description |
| OCD | Operational Concept Document |
| OCD | Operational Concept Document (AF) |
| OCDM | Office of Civil and Defense Mobilization |
| OCE | Officer Conducting the Exercise |
| OCEANLANT | Ocean Sub-Area Atlantic |
| OCEG | Open Compliance and Ethics Group |
| OCG | Operational Coordination Group |
| OCG | Overall Coordination Group |
| OCHA | Office for the Coordination of Humanitarian Affairs |
| OCHAMPUS | Office of Civilian Health and Medical Program of the Uniformed Services |
| OCI | Open Circuit Interval |
| OCI | Organizational Conflict of Interest |
| OCL | Object Constraint Language |
| OCLC | Online Computer Library Center |
| OCLL | Office, Chief of Legislative Liaison (Army) |
| OCM | On Condition Maintenance |
| OCM | Optical Counter Measures |
| OCM | Outgoing Communications Manager |
| OCN | Open Computer Network |
| OCO | Off-load Control Officer |
| OCO | Operating and Control Organization |
| OCONUS | Outside Continental United States |
| OCONUS | Outside the Continental United States |
| OCP | Operational Computer Program |
| OCR | Optical Character Reader |
| OCR | Optical Character Recognition |
| OCS | Officer Candidate School |
| OCS | Officer Conducting the Serial |
| OCS | Overload Control Subsystem |
| OCSA | Office of the Chief of Staff, U.S. Army |
| Octal | Base-8 counting system. Numbers include 0,1,2,3,4, 5,6,7,8. |
| OD | Optical Digital Data Disk |
| ODA | Office Document Architecture |
| ODA | Open Document Architecture |
| ODADS | Omnidirectional Air Data Sensor |
| ODAM | OSD Office of the Director of Administration and Management |
| ODAP | Oceanic Display And Planning system. Will present oceanic flight data to controllers in a display that will enable better route and altitude assignments. |
| ODB | Object Oriented Database |
| ODB | Open Database |
| ODBC | Open Database Connectivity |
| ODBMS | Object Database Management System |
| ODC | Office of Defense Corporation |
| ODC | Operation Desert Capture |
| ODC | Ozone Depleting Chemical |
| ODCSLOG | Office Depot Chief Staff Log |
| ODDR&E | Office of the Director, Defense Research and Engineering |
| ODDS | Offboard Deception Devices System |
| ODES | Operational and Deployment Experiments Simulator |
| ODETTE | Organisation for Data Exchange through Tele-Transmission in Europe |
| ODI | Open Data-link Interface |
| ODI | Open Datalink Interface |
| ODID | Operational Display and Input Development |
| ODIF | Office Data Interchange Format |
| ODIF | Office Document Interchange Format |
| ODIN | Operational Digital Network |
| ODIT | Optical Digital Imaging Technology |
| ODL | Optical Data Link |
| ODL | Oceanic Display and Planning System |
| ODL | Object Definition Language |
| ODL | Open Document Language |
| ODM | Oil Debris Monitoring |
| ODM | Organizational Domain Modeling |
| ODM | Original Design Manufacturer |
| ODMG | Object Data Management Group |
| ODN | Optical Distribution Network |
| ODP | Office for Domestic Preparedness |
| ODP | Office of Disaster Preparedness |
| ODP | Online Distributed Processing |
| ODP | Open Distributed Processing |
| ODP | Originator Detection Pattern |
| ODP | Overall Documentation Plan |
| ODS | Optical Data System |
| ODS | Ordering Data Sheets |
| ODS | Ozone Depleting Substance |
| ODSI | Open Directory Services Interface |
| ODT | Operational Demonstration Test |
| ODTC | Office of Defense Trade Controls |
| OE | Operating Environment |
| OE | Operational Effectiveness |
| OE | Organizational Element |
| OEA | Ocean Executive Agent |
| OEB | Open Electronic Book |
| OECD | Organization for Economic Cooperation and Development |
| OED | OSIS Evolutionary Development |
| OEM | Original Equipment Manufacturer |
| OEM | Other Equipment Manufacturer |
| OEO | Office Equipment Outlet |
| OEO | Office of Economic Opportunity |
| OEO | Office of Equal Opportunity |
| OEO | Operations Evaluation Office |
| OEP | Office of Emergency Preparedness |
| OEPE | OptoElectronic Processing Elements |
| OER | Organizational Efficiency Review |
| OERP | Organizational Efficiency Review Program |
| OESO | Ordnance Environmental Support Office |
| OET | Office of Emergency Transportation |
| OET | Office of Engineering and Technology |
| OEU | Overhead Electronics Units |
| OF | Officer |
| OFAC | Office of Foreign Assets Control |
| OFB | Output Feedback |
| OFDA | Office for Foreign Disaster Assistance |
| OFDM | Orthogonal Frequency Division Multiplexing |
| OFE&AS | Organization For Embarkation and Assignment to Shipping |
| OFF | Officer |
| Off-Block Time | The time that the aircraft leaves the gate. |
| OFM | Office of Financial Management |
| OFN | Other Forces for NATO |
| OFP | Operational Flight Program |
| OFPP | Office of Federal Procurement Policy |
| OFS | Object File System |
| OFS | Operational Fixed Service |
| OFSTP | Optical Fiber Systems Test Procedure |
| OFT | Operational Flight Trainer |
| OFTP | Off-Line Transaction Processing |
| OFX | Open Financial Exchange |
| OGA | Other Government Agency |
| OGC | Office of the General Council |
| OGE | Out of Ground Effect |
| OGM | Outgoing Message |
| OGRI | Open Group Research Institute |
| OGSA | Open Grid Services Architecture |
| OH | On Hand |
| OH | Operational Handbook |
| OHAN | Optical Hybrid Access Network |
| OHB | On Hand Balance |
| OHG | Operator Harmonization Group |
| OHR | Office of the High Representative |
| OI | Operating Instruction |
| OI | Operational Instruction |
| OI | Outline of Investigation |
| OIC | Officer In Charge |
| OIC | Officer-In-Charge |
| OICC | Officer In Charge of Construction |
| OICC | Operations Intelligence Crisis Center |
| OICW | Objective Individual Combat Weapon |
| OID | Outline Installation Drawing |
| OID | Object Identifiers |
| OID | Organizational Innovation and Deployment |
| OIF | Optical Internetworking Forum |
| OIG | Office of Inspector General |
| OII | Operations Intelligence Interface |
| OIP | Operational Improvement Program |
| OIPT | Overarching Integrated Product Team |
| OIR | Other Information Requirement |
| OIRA | Office of Information and Regulatory Affairs |
| OIS | Office Information System |
| OIS | Office Information Systems |
| OIT | Optical Image Technology |
| OIU | Orientation/Introduction Unit |
| OIW | Open Systems Environment Implementers Workshop |
| OIW | Open Systems Implementers Workshop |
| OJ | Official Journal |
| OJEC | Official Journal of the European Communities |
| OJT | On the Job Training |
| OLA | Office of Legislative Affairs (Navy) |
| OLA | On-line Archive |
| OLAFAS | On-line Automated Frequency Assignment System |
| OLAN | Onboard Local Area Network |
| OLAP | On Line Analytical Processing |
| OLAR | On-Line Add/Replacement |
| OLC | Open Logical Channel |
| OLE | Object Linking and Embedding |
| OLM | Off Line Maintenance |
| OLR | On-Line Reconfiguration |
| OLR | On-Line Replacement |
| OLR | Overall Loudness Rating |
| OLSP | Operational Logistic Support Plan |
| OLT | Optical Line Termination |
| OLTP | On-Line Transaction Processing |
| OM | Outer Marker |
| OM | Computer Operations Manual |
| OM | Object Model |
| OM | Operator’s Manual |
| OM/A/N/AF/MC | Operation and Maintenance (Appropriation), Army/Navy/AirForce/USMC |
| OMA | Object Management Architecture |
| OMA | Organizational Maintenance Activity |
| OMB | Office of Management and Budget |
| OMB | Office of Manpower and Budget |
| OMC | Operations and Maintenance Centre |
| OMD | Operations Maintenance Division |
| OMDD | Object Model Data Dictionary |
| OMDDS | Object Model Data Dictionary System |
| OMDT | Object Model Development Tool |
| OMEGA | A navigation system that uses two high-powered transmitter ground stations to broadcast a continuous wave signal. The receiver measures the range difference between the two stations to determine position. |
| OMEGA | Operational Multiscale Environment Model with Grid Adaptivity |
| OMF | Object Management Facility |
| OMFTS | Operational Maneuver From T he Sea |
| OMFTS | Operational Maneuver From The Sea |
| OMG | Object Management Group |
| omicron | Observed Point Estimate Mean-Time-Between-Failure |
| OML | Object Model Library |
| OMNCS | Office of the Manager, National Communications System |
| Omnibearing | The bearing indicated by a navigational receiver on transmissions from an omni directional radio range (VOR). |
| OMO | Other Military Operations |
| OMPS | Outboard Mission Planning System |
| OMR | Optical Mark Recognition |
| OMS | Onboard Maintenance System |
| OMS | Order Management System |
| OMS | Object Management System |
| OMS | Online Mass Storage |
| OMS/MP | Operational Mode Summary/Mission Profile |
| OMT | Object Model Template |
| OMT | Object Modeling Technique |
| OMT | Object Modeling Template |
| OMT | Overhead Message Train |
| OMU | Operations and Maintenance Unit |
| On-Block Time | The time that the aircraft arrives at the gate. |
| ONA | Open Network Architecture |
| ONC | Open Network Computing |
| ONC | Operational Navigational Chart |
| ONE | Other Network Entities |
| ONI | Office of Naval Intelligence |
| ONMS | Open Network Management System |
| ONP | Open Network Provision |
| ONR | Office of Naval Research |
| ONS | Office of NATO Standardization |
| ONS | On Premise Station |
| ONST | Outline NATO Staff Target |
| ONT | Optical Network Termination |
| ONT | Out-of-National Territory |
| ONU | Optical Network Unit |
| OO | Object Oriented |
| OOA | Object Oriented Analysis |
| OOA | Out Of Area |
| OOA/D | Object Oriented Analysis/Design |
| OOAD | Object Oriented Analysis and Design |
| OOB | Order Of Battle |
| OOB | Out of Band |
| OOD | Object Oriented Design |
| OOD | Officer of the Deck |
| OODA | Object Oriented Design with Assemblies |
| OODA | Observe, Orient, Decide and Act |
| OODBMS | Object Oriented Data Base Management System |
| OOF | Object of Functionality |
| OOF | Out of Frame |
| OOI | Object Oriented Interface |
| OOK | On Off Keying |
| OOM | Object Oriented Methods |
| OOM | Object Oriented Modeling |
| OOOI | OUT-OFF-ON-IN. An OOOI event is recorded as part of the ACARS operation. The OUT event is recorded when the aircraft is clear of the gate and ready to taxi. The OFF event occurs when the aircraft has lifted off the runway. The ON event occurs when the aircraft has landed. The IN event occurs when the aircraft has taxied to the ramp area. |
| OOP | Object Oriented Programming |
| OOPL | Object Oriented Programming Language |
| OOPSLA | Object Oriented Programming, Systems, Language and Applications (annual conference) |
| OOR | Operator Override |
| OOSE | Object Oriented Software Engineering |
| OOSE | Object Oriented Systems Engineering |
| OOT | Object Oriented Technologies |
| OOT | Object Oriented Technology |
| OOTB | Out Of The Box |
| OOTW | Operations Other Than War |
| OOV | Object Of Verification |
| OOW | Out Of Warranty |
| OP | Operational Picture |
| OP | Operations |
| OP | Order Processing |
| OP | Other Procurement |
| Op | Operation |
| OP-AMP | Operational Amplifier |
| OP/A/N/AF | Other Procurement (Appropriation), Army/Navy/Air Force |
| OPA | Oil Pollution Act |
| OPAC | Online Payment and Collection System |
| OPAC | Online Public Access Catalog |
| OPAS | Overhead Panel ARINC 629 System |
| OPASTCO | Organization for the Promotoion and Advancement of Small Telecommunications Companies |
| OPBC | Overhead Panel Bus Controller |
| OPC | Optical Proximity Correction |
| OPCEN | Operations Centers/Command Centers |
| OPCODE | Operation Code |
| OPCODE | Operational Code |
| OPCOM | Operational Command |
| OPCON | Operational Control |
| OPD | Organizational Process Definition |
| OPDEC | Deception Operations |
| OPDEC | Operational Deception |
| OPE | Other Plant Equipment |
| OpenHCI | Open Host Controller Interface |
| OPER | Operator |
| OPEVAL | Operational Evaluation |
| OPF | Organizational Process Focus |
| OPFAC | Operational Facility |
| OPFOR | Opposing Forces |
| OPG | Organizational Process Group |
| OPGEN | Operational Formatted Message |
| OPHS | Office of Public Health and Science |
| OPI | Office of Primary Interest |
| OPI | Optional Procedure Indicator |
| OPINTEL | Operational Intelligence |
| OPK | OEM Preinstallation Kit |
| OPLAN | Operation Plan |
| OPLAN | Operational Plan |
| OPLAN | Operations Plan |
| OPLANS | Operational Plans |
| OPLAW | Operational Law |
| OPLSM | Operational Phase Logistic suuport Manager |
| OPM | Office of Personnel Management |
| OPMS | Officer Personnel Management System |
| OPN | Open |
| OPN | Other Procurement Navy |
| OPNAV | Chief of Naval Operations |
| OPNAV | Office of the Chief of Naval Operations |
| OPNAVINST | Chief of Naval Operations Instruction |
| OPNAVINST | Office of the Chief of Naval Operations Instruction |
| OPNET | Operations Network |
| OPORD | Operation Order |
| OPORD | Operational Order |
| OPORD | Operations Order |
| OPORDER | Operations Order |
| OPP | Off-load Preparation Party |
| OPP | Operational Planning Process |
| OPP | Organizational Process Performance |
| OPR | Once Per Revolution |
| OPR | Office of Primary Responsibility |
| OPRB | Operational Planning and Review Board |
| OPREP | Operation Report |
| OPREP | Operational Report |
| OPS | Operations Per Second |
| OPS | Operating Subsystem |
| OPS | Operational |
| OPS/CHK | Operational Check |
| OPSEC | Operational Security |
| OPSEC | Operations Security |
| OPSG | Operation Plans Steering Group |
| OPSIT | Operational Situation |
| OPSTR | Operational Strength |
| OPT | Open Protocol Technology |
| OPT | Operational Planning Team |
| OPT | Operations Planning Tool |
| OPT | Optional Modification |
| OPTADS | Operations Tactical Data System |
| OPTADS | Operations Tactical Data Systems |
| OPTAR | Operating Target |
| OPTARTD | Operating Target |
| OPTASK | Operational Task |
| OPTEVFOR | Operational Test and Evaluation Force |
| OPTN | Option |
| OPU | Overspeed Protection Unit |
| OPX | Off Premise Extensions |
| OR | Operational Requirements |
| OR | Operational Requirement |
| OR | Operations Research |
| OR | Other ranks |
| OR/SA | Operations Research/Systems Analysis |
| ORA | Organizational Registration Authority |
| ORACLE | Operational Research and Critical Link Evaluation |
| ORB | Object Request Broker |
| ORB | Operation Request Block |
| ORBAT | Order of Battle |
| ORBL | Operational Requirements Baseline |
| ORCA | Operational Requirement based Casualty Assessment |
| ORCA | Optimized Robot for Chemical Analysis |
| ORD | Operational Requirements Document |
| ORD | Ordnance |
| ORDALT | Ordnance Alteration |
| ORDALTS | Ordnance Alterations |
| ORDBMS | Object/Relational Data Base Management System |
| ORDQ | Order Qualification |
| ORE | Operational Readiness Evaluation |
| ORG | Origin |
| ORI | Operational Readiness Inspection |
| ORID | Operational Requirements Document |
| ORMS | Operating Resource Management System |
| OROM | Optical Read Only Memory |
| ORP | Operational Readiness Platform |
| ORREQ | Origination Request |
| ORSA | Operations Research Systems Analysis |
| ORSE | Operational Reactor Safeguards Exam |
| ORSMC | Off Route Smart Mine Clearance |
| ORT | OSD Review Team |
| ORT | Ongoing Reliability Testing |
| ORT | Operational Readiness Test |
| ORT | Operationally Ready Time |
| ORTA | Office Research and Technology Applications |
| ORTP | Operational Readiness Test Program |
| ORWG | Operational Requirements Working Group |
| OS | Open System |
| OS | Operating Software |
| OS | Operating System |
| OS | Operational Suitability |
| OS/2 | Operating System 2 |
| OSA | Open Service Architecture |
| OSA | Open Systems Architecture |
| OSA | Operational Support Aircraft |
| OSA | Operational Support Airlift |
| OSA | Operational Support Authority |
| OSA | Outfitting Support Activity |
| OSAMM | Optimum Supply and Maintenance Model |
| OSB | Operational Stations Book |
| OSC | Order Status Report |
| OSC | Office of Standards Compliance |
| OSC | On Scene Commander |
| OSC | On Scene Coordinator |
| OSC | Operating System Control |
| OSC | Operations Support Center |
| OSC | Operators Services Complex |
| OSCAR | Online Scanning And Retrieval |
| OSCC | Open Skies Consultive Commission |
| OSCE | Organization for Security and Cooperation in Europe |
| OSCR | Operating and Support Cost Reduction |
| OSD | Office of the Secretary of Defense |
| OSD | On Screen Display |
| OSD | Open Software Description |
| OSD(C) | Office of the Secretary of Defense (Comptroller) |
| OSDN | Open Source Development Network |
| OSE | Officer Scheduling the Exercise |
| OSE | Open System Environment |
| OSE | Open Systems Environment |
| OSE/IA | Open System Environment Profile for Imminent Acquisition |
| OSEA | Organization for Synthetic Environment Architecture |
| OSF | Open Software Forum |
| OSF | Open Software Foundation |
| OSF | Open Systems Foundation |
| OSGI | Open Serve Gateway Initiative |
| OSH | Occupational Safety and Health |
| OSHA | Occupational Safety and Health Administration |
| OSHA | Occupational Safety and Health AdministrationÊ |
| OSI | Open Systems Interconnection |
| OSI | Open System Interface |
| OSI | On Site Inspection |
| OSI | Open Switching Interval |
| OSI | Open System Interconnection |
| OSI | Open Systems Interconnect |
| OSI | Other Security Interests |
| OSIA | On-Site Inspection Agency |
| OSINT | Open Source Intelligence |
| OSIP | Operational safety and Improvement Program |
| OSIRIS | Optimized Synthetic Infrared Interactive Simulation |
| OSIRM | Open Systems Interconnection Reference Model |
| OSIS | Ocean Surveillance Information System |
| OSIS | Open Source Information System (CIA) |
| OSM | Operating System Service Module |
| OSMN | Operations and Maintenance Navy |
| OSN | One Stop Notification |
| OSO | Offensive System Operator |
| OSOCC | On Site Operations Coordination Center |
| OSOR | Operational Stand Off Range |
| OSP | Open Settlement Protocol |
| OSP | Optimized Software Process |
| OSP | Other Service Program |
| OSPF | Open Shortest Path First |
| OSPG | Operation Support Group Prototype |
| OSQAM | Operating Standards and Quality Assurance Manual |
| OSQL | Object-oriented Structured Query Language |
| OSR | On Site Representative |
| OSR | On-Site Rep |
| OSRM | Open System Reference Model |
| OSRP | Own Ship Reference Point |
| OSS | Online Schedule System |
| OSS | Operational Support System |
| OSS | Operations Support System |
| OSSC | On Scene Surveillance Coordinator |
| OSSP | Organization Standard Software Process |
| OST | Online Service Provider |
| OST | Open Skies Treaty |
| OST | Operational Requirements Document Support Team |
| OSTA | Optical Storage Technology Association |
| OSTP | Office of Science and Technology Policy |
| OSU | Oceanographic Support Unit |
| OSU | Operators Support Unit |
| OT | Operational Test |
| OT | Order Type |
| OT&E | Operational Test and Evaluation |
| OT&E | Operator Training and Evaluation |
| OTA | Office of Technology Assessment |
| OTA | Open Travel Alliance |
| OTA | Operational Test Agency |
| OTA | Operational Transconductance Amplifier |
| OTAD | Over The Air Distribution |
| OTAD | Over-The-Air Key Distribution |
| OTAPA | Over-the-Air Parameter Administration |
| OTAR | Over The Air Rekeying |
| OTAR | Over-The-Air-Rekeying |
| OTAT | Over-The-Air Key Transfer |
| OTAT | Over-The-Air-Transfer |
| OTAU | Over The Air Update |
| OTAU | Over The Air Updating |
| OTC | Officer in Tactical Command |
| OTC | On Tape Catalog |
| OTC | Operational Test Coordinator |
| OTCIXS | Officer Tactical Command Information Exchange System |
| OTCIXS | Officer in Tactical Command Information Exchange Subsystem |
| OTD | On Time Delivery |
| OTD | Operational Test Director |
| OTDR | Optical Time Domain Reflector |
| OTDR | Optical Time-Domain Reflectometer |
| OTE | Operational Test Environment |
| OTE | Operational Test and Evaluation |
| OTE | Operator Training Equipment |
| OTFI | One Time Feature Indicator |
| OTG | Over-the Horizon Targeting Gold message format |
| OTH | Over The Horizon |
| OTH-B | Over The Horizon Backscatter |
| OTH-T | Over The Horizon Targeting |
| OTHT | Over The Horizon Targeting |
| OTI | Office of Technical Integration |
| OTI | Office of Technical Integration (DISA) |
| OTI | Open Telecom Infrastructure |
| OTIS | Office of Telecommunications and Information Systems |
| OTM | Object Transaction Manager |
| OTM | On The Move |
| OTN | Optical Network Terminal |
| OTNT | Optical Transport Networks and Technologies |
| OTOH | On TheOther Hand |
| OTP | One Time Programmable |
| OTP | One-Time Pad |
| OTP | One-Time Programmable |
| OTP | Open Trading Protocol |
| OTP | Operational Test Plans |
| OTPI | On Top Position Indicator |
| OTPS | Operational Test Program Set |
| OTRR | Operational Test Readiness Review |
| OTS | Organized Track System |
| OTS | OSI Transparent Services |
| OTS | Off-The-Shelf |
| OTS | Officer Training School |
| OTS | Open Transport Service |
| OTSR | Optimum Track Ship Routing |
| OTT | Ocean Tactical Targeting |
| OTT | Office of Technology Transition |
| OTT | One-Time Tape |
| OTTR | OPEVAL Test Readiness Review |
| OU | Organizational Unit |
| OUG | Operational User Group |
| OUSD(A&T) | Office of the Under Secretary of Defense for Acquisition & Technology |
| OUSD(A&T) | Office of the Under Secretary of Defense for Acquisition and Technolog |
| OUSD(A&T)/S&TS/EW | Office of the Undersecretary of Defense for Acquisition and Technology/Strategic and Tactical Systems/Electronic |
| OUSD(AT&L) | Office of the Under Secretary of Defense (Acquisition, Technology and Logistics) |
| OUSD(P&R) | Office of the Under Secretary of Defense for Personnel & Readiness |
| OUT | Outsize Cargo |
| OV | Operational Value |
| OV | Operational View |
| OVHD | Over Head |
| OVI | Operator Vehicle Interface |
| OVR | Oversize Cargo |
| OVRD | Override |
| OVTQ | Over Torque |
| OW | Obstacle Warning |
| OW | Operating Wing |
| OW | Outer Wing |
| OWC | Operational Watch Commander (Navy) |
| OWDM | Original Water Depth Mine |
| OWL | Object Windows Library |
| oxy | Oxygen |
