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O
Oscar (phonetic alphabet) |
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O
Oxygen |
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O
Time zone 22.5 W - 37.5 W (GMT +2) |
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O&D
Organization & Deployment |
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O&M
Operations & Maintenance |
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O&M
Organization & Methods |
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O&O
Operational & Organisational |
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O&S
Operations & Support / Sustainment |
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O/C
On Completion |
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O/R
Over-ride |
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oa
Overall length (of warship) |
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OA
Operational Analysis |
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OAB
Outer Air Battle |
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OAC
Oceanic Area Control |
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OACM
Offensive Air Combat Manoeuvre |
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OAD
Operator Aiding Demonstrator |
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OADS
Omnidirectional Air-Data System |
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OAF
OAF Graf & Stift AG (Austria) |
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OAMCE
Organisation Africaine et Malgache de Co-operation Economique |
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OAMP
Optical Airborne Measurement Platform |
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OAPEC
Organisation of Arab Petroleum Exporting Countries |
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OAR
Office of Aerospace Research (USAF) |
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OAR
Operational Analysis & Research |
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OAS
Offensive Air Support |
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OAS
Offensive Avionics System |
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OAS
On Active Service |
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OAS
Organization of American States |
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OASAA
Other Arms NCOs Skill At Arms (UK) |
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OASC
Officer & Aircrew Selection Center (USA) |
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OASD
Office of the Assistant Secretary of Defence |
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OASIS
Operational Applications of Special Intelligence Systems (USA) |
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OASIS
Office Automation Secure Information System |
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OASIS
Over-the-horizon Airborne Sensor Information System |
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OASYS
Obstacle Avoidance System |
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OAT
Operational Air Traffic |
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OAT
Optional Application Tapes |
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OAT
Outside Air Temperature |
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OATS
Over-Armor Technology Synthesis (USA) |
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OATS
Oxford Air Training School (UK) |
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OAU
Organisation of African Unity |
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OAV
Offensive Action Vehicle (British Army) |
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OB
Civil aircraft marking (Peru) |
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OB
Order of Battle |
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OB
Ordnance Board |
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OBC
Optical Barrel Camera |
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OBE
Offboard Expendables |
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OBE
Overcome / Overtaken By Events |
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OBEWS
On-Board Electronic Warfare Simulator |
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OBFM
Offensive Basic Flight Manoeuvres |
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OBGS
On-Board Gunnery Simulator |
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OBI
Omni-Bearing Indicator |
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OBIGGS
On-Board Inert Gas Generating System |
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OBIS
Optical Backplane Interconnect System programme (US Navy) |
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OBJS
Off-Board Balloon Jammer System (USA) |
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OBOGS
On-Board Oxygen Generating System |
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OBP
On-Board Processing |
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OBR
Optical Beam Riding |
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OBRP
On-Board Repair Parts |
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OBRUM
Rsearch & Development Center of Mechanical Appliances, Gliwice, Poland |
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OBS
Observation Balloon System |
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OBS
Omni-Bearing Selector |
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OBS
On-Board Subsystem |
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OBS
Ottestad Breathing System |
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OBT
On-Board Trainer/Training |
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OBTS
On-Board Test Set |
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OBU
OSIS Baseline Upgrade |
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OBUA
Operating in Built-Up-Areas |
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OBVACT
On-Board Visual Aimer Continuation Trainer |
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OC
Observer / Controller |
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OC
Officer Commanding |
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OC&S
Ordnance Center & School |
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OCA
Offensive Counter-Air |
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OCA
Operational Control Authority |
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OCAM
Organisation Commune Africaine et Mauricienne |
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OCC
Obus a Charge Creuse. Shaped
charge shell (France) |
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OCC
Operational Capabilities Concept (NATO) |
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OCC
Operational Control Centre |
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OCC
Operator Control Console |
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OCCABA
Open Circuit Compressed Air Breathing Apparatus |
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OCCAR
Organisation de Cooperation Conjointe en matiere d'Armement |
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OCCIS
Operations Control & Command Information System (USA) |
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OCCM
Optical Counter Countermeasures |
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OCCULT
Optical Covert Communications Using Laser Transceivers (USA) |
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OCD
Office of Civil Defense (USA) |
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OCD
Central Office for General Defense (Switzerland) |
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OCD
Operational Concept Demonstration |
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OCDS
OTOMAT Coastal defence System |
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OCE
Officer Conducting the Exercise |
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OCEANAV
Oceanographer of the Navy (US Navy) |
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OCEANLANT
Ocean Sub-Area, Atlantic (NATO) |
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OCF
Officiating Chaplain to the Forces |
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OCG
Operations Control Group |
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OCIDAS
Ocean Intervention and Data Assimilation System |
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OCL
Obstacle Clearance Limit |
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OCL
Overall Cartridge Length |
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OCM
Optical Countermeasures |
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OCNR
Office of the Chief of Naval Research (USA) |
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OCONUS
Outside Continental United States |
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OCP
Operational Computer Program (USA) |
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OCP
Oerlikon-Contraves Pyrotec AG (Switzerland) |
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OCPO
Office of Civilian Personnel Operation (USA) |
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OCR
Operational Capability Release |
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OCR
Operational Control Room |
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OCR
Optical Character Reader / Recognition |
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OCS
Officers Command School (UK) |
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OCS
Obstacle Clearance Surface |
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OCS
Officer Cadet School |
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OCS
Officer Candidate School |
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OCS
Operational Control Segment |
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OCS
Original Combat System |
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OCSW
Objective Crew Served Weapon (US Army) |
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OCTU
Officer Cadet Training Unit |
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OCU
Operational Conversion Unit (training) |
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OCU
Operator's Control Unit |
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OCU
Operational Capabilities Upgrade |
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OCWP
Operational Control Work Post |
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OD
Civil aircraft marking (Lebanon) |
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OD
Olive Drab |
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OD
Ordinary Seaman |
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OD
Ordnance Data |
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OD
Ordnance Delivery |
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OD
Ordnance Disposal |
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OD
Outside Diameter |
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ODA
Office Document Architecture |
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ODA
Official Development Assistance |
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ODA
Operations in Defence of Australia |
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ODC
Overseas Development Corp. (USA) |
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ODC
Office of Defense Co-ordination (USA) |
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ODCOPS
Office of the Deputy Chief of Staff for Operations & Plans (USA) |
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ODCSLOG
Office of the Deputy Chief of Staff for Logistics (USA) |
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ODE
Ordnance Development & Engineering (Singapore) |
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ODECA
Organisacion de Estados Centro-americanos.
Organization of Central American States |
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ODESSA
Oceanographic Data & Environmental Satellite System Application |
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ODG
Ontario Drive & Gear Ltd (Canada) |
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ODG
O'Donnell Griffin (Australia) |
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ODIF
Office Document Interchange Format |
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ODIN
Operational Data Interface |
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ODL
Office Document Language |
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ODM
Operational Development Model |
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ODM
Optical Driver Modem |
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ODP
Ozone Depletion Potential |
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ODR
Overland Downlook Radar |
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ODS
Optical Disk System |
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ODS
Operation DESERT STORM (US Army) |
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OD&T
Operational Doctrine & Training (RAF) |
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ODT
Omni-Directional Transmission |
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ODT
Outdoor Trainer |
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OE
Civil aircraft marking (Austria) |
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OE
Opto-Electronic |
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OECD
Organisation for Economic Co-operation & Development |
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OED
Operational Evaluation Demonstration |
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OEEC
Organisation for European Economic Co-operation.
Now OECD |
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OEG
Occluded Eye Gunsight |
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OEI
One Engine Inoperative |
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OEIC
Opto-Electronic Integrated Circuit |
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OEM
Original Equipment Manufacturer |
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OEP
Office of Emergency Preparedness (USA) |
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OER
Officer Evaluation Report (USA) |
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OER
Officer Effectiveness Report |
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OER
Operational Effectiveness Rate |
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OES
Officer Evaluation System |
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OETC
Opto-Electronic Technology Consortium (USA) |
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OEU
Operational Evaluation Unit (UK Royal Air Force) |
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OEW
Operating Empty Weight |
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OEW
Ordnance & Explosive Waste |
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OFAB
Oskolochnaya Fugasnaya Aviabomba. Fragmentation demolition bomb (Russia) |
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OFADJ
Federal Office of Adjudancy (Switzerland) |
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OFART
Federal Office of Artillery (Switzerland) |
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OFB
Ordnance Factory Board (India) |
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OFC
Overhead Foxhole Cover |
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OFD
Optical Fire Director |
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OFDE
Optronique-Farbricantes de Electronicas Lda (Portugal) |
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OFE
Operative Functional Element |
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Offr
Officer (British Army) |
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OFINF
Federal Office of Infantry (Switzerland) |
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OFM
Otto Fuel Monitor |
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OFP
Operational Flight Programme |
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OFPA
Federal Office of Armament Production (Switzerland) |
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OFPP
Office of Procurement & Policy |
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OFS
Operational Flying School (UK Royal Navy) |
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OFS
Operational Flight Simulator |
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OFSA
Optical Fire Sensor Assembly |
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OFSA
Objective Family of Small Weapons |
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OFSAN
Federal Office of Military Health Service (Switzerland) |
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OFT
Operational Flight Trainer |
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OFT
Orbital Flight Test |
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OFTML
Federal Office of Armoured & Light Troops (Switzerland) |
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OFTS
Operational Flight & Tactics Simulator |
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OFTT
Federal Office of Transport Troops (Switzerland) |
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OFTT
Operational Flight & Tactics Trainer |
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OG
Observation Group (USA) |
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OGA
Office General de l'Air (France) |
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OGD
Open Government Document |
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OGE
Out of Ground Effect. Helicopter hovering far above nearest surface |
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OGLA
Officer Grade Limitation Act (USA) |
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OGMA
Oficinas Gerais de Material Aeronautico (Portugal) |
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OGV
Outlet Guide Vane |
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OH
Civil aircraft marking (Finland) |
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OH
Ohio (US state) |
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OH
Overhaul |
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OH
Overhead |
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OHA
Operating Hazard Analysis |
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OHC
Overhead Cam Shaft |
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OHS
Oceanography & Hydrographic Ship (Royal Australian Navy) |
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OHU
Optical Head Unit |
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OHV
Overhead Valve |
| OHWS
Offensive Handgun Weapon System (USA) |