
Abbreviations, Acronyms, Codewords, Terms
---O---
---O---
OAKTREE
OASW
Office of the Assistant Secretary of War
OATMEAL
OATMEAL
Labuan Island, North Borneo
Ob d H--Oberbefehlshaber des Heeres
Commander-in-Chief of the Army (German: p. 70a)
OBELISK
OBEN
Oberkommando des Heeres
Army High Command (German: p. 3, 70a)
Oberkommando der Kriegsmarine
Navy High Command (German: p. 3)
Oberkommando der Luftwaffe
Air Force High Command (German: p. 4)
Oberkommando der Wehrmacht
Armed Forces High Command (German: p. 1, 2, 11)
OBERON
Davao Gulf, Mindanao, P.I.
Oberquartiermeister--See O Qu O Qu--Oberquartiermeister
Senior General Staff Officer (German: p. 73)
Oberster Befehlshaber der Wehrmacht
Supreme Commander of the Armed Forces (German: p. 12)
OBESE
OBLIQUE
OBOE
Radar navigation and blind-bombing system using two ground stations measuring distance to a radar beacon on the aircraft. Overlord Overall plan for invasion of Western Europe in 1944.
Obs
Obsn(s)
Obsr(s)
Obst Bfh d Wm--Oberster Befehlshaber der Wehrmacht
Supreme Commander of the Armed Forces (German: p. 12)
OB SUED
Oberbefehlshaber Sued, German theater headquarters in Italy
OBTRUSIVE
OB WEST
Oberbefehlshaber West, Highest German ground headquarters of the Western Front
OCAAC
Office of the Chief of the Army Air Corps
OCCIDENTAL
OCD
Office of Civilian Defense
OCE
Office, Chief of Engineers
OCEANBLUE
OCELOT
OCof Engrs
Office, Chief of Engineers
OCofS
Office of the Chief of Staff
OCof T
Office, Chief of Transportation
OCMH
Office, Chief of Military History
OCNO
Office of the Chief of Naval Operations
OCS
Office of the Chief of Staff
OCSigO
Office of the Chief Signal Officer
OCT
Office of the Chief of Transportation
OCTAGON
Quebec Conference (September 1944); Roosevelt-Churchill
OCTOPUS
Marklo Island, New Britain
OCTOPUS
OCTOROON
Palau Harbor, Palau Islands
ODCofS
Office of the Deputy Chief of Staff
ODCS
Office, Deputy Chief of Staff
ODIOUS
ODOP
OEM
Office of Emergency Management
Off(s)
OFF
Office of Facts and Figures
Ofl
OICC
Officer in Charge of Construction
O-in-C
OKEMAN
OKH
Oberkommando des Heeres (Army High Command)
OKL
Oberkommando der Luftwafe (Luftwaffe High command)
OKM
Oberkommando der Kriegsmarine (Navy High Command)
OKRA
Townsville, Queensland, Australia
OKW
Oberkommando der Wehrmacht (Armed Forces High Command)
OLEANDER
Munda Island, Solomon Islands
OLIVE
Taivu Point, Guadalcanal, Solomon Islands
OLYMPIC
Intended invasion of Kyushu, Japan (1945)
OLYMPUS
Cape Padaran, French Indo China
OMAHA
D-day Beach assaulted by troops of U.S. V Corps, 6 June 1944
ONCEOVER
O.N.I./ONI
Office of Naval Intelligence
ONOTO
Op
OP
Observation post; outpost
Op Abt--Operationsabteilung
Operations Branch (German: p. 77)
OPD
Operations Division, U.S. Army (after March 1942)
OPIUM
Transfer of 3rd U.S. Marine Regiment to Samoa
OPlan
OPM
Office of Production Management
Opn(s)
OpNav
Office of the Chief of Naval Operations
OpOrd
Op plan
Ops
OPTOMETRIST
Lula Lagoon, Choiseul Island, Solomon Islands
OQMG
Office of the Quartermaster General
ORANGE
Japan. Prewar plan for operations in event of war with Japan.
ORANGEADE
Moemi Airfield, New Guinea
ORATOR
Kaibola, Lusancay Island, Trobriand Islands
Operation C (Japanese)
Projected advance into India--February, 1944
ORC
ORC
ORCHID
Tenaru Signal Tower, Guadalcanal, Solomon Islands
Ord
Ord
ORDEAL
OREX
Seeadler Harbor, Manus Island, Admiralty Island
Org. Abt.
Organisations Abteilung (Staff subdivision in charge of organization)
ORGANGRINDER
Organization Todt
Paramilitary construction organization of the Nazi party, auxiliary to the Wehrmacht. Named after its founder, Dr. Todt.
Orgn
ORIENTAL
Komebail Lagoon, Palau Islands
ORIGIN
3rd U.S. Naval Training Base, British Isles
ORIOLE
Naso Point, Kandavu Island, Fiji Islands
ORNATE
Puerto Castillo, Honduras
ORTHODOX
OSCAR
The Nakajima type 1 single-engine fighter (Japanese)
OSCAR
O.S.S.
Office of Strategic Services
Ost
OSTENTATION
OSTLER
Tongareva (Penrhyn) Island, Cook Islands
Osttruppen
Non-German volunteer troops from east-European countries
OSW
O.T.C.
Officer in Tactical Command
Ott
O.T.U.
Operational Training Unit
OUSW
Office of the Under Secretary of War
OUTBUILDING
OUTCROP
OUTFLANK
British Pacific Fleet raid on Pangkalan Brandan, 20 Nov 44
OUTGENERAL
Engebi Island, Eniwetok, Marshall Islands
OUTGOING
Komsomoesk-Nokolaevsh Area, U.S.S.R.
OUTJOCKEY
Ulejang Atoll, Marshall Islands
OUTRANGE
OUTRIGHT
Ngatik Island, Caroline Islands
OUTSPOKEN
OUTSTEP
OVERBOARD
Sovetskaya Gavan, U.S.S.R.
OVERBUILD
Parry Island, Eniwetok, Marshall Islands
OVERCAST
The project of exploiting German civilian scientists
OVERCOAT
Staines, British Isles (Central Spare Parts Depot)
OVERDOSE
OVERFEED
OVERFLOW
OVERHEAD
OVERLORD
General operational plan for invasion of Europe, spring 1944
OVERPAY
Rhodes, Mediterranean Sea
OVERPITCH
OVERSCENTED
Bandjermasin, Dutch Borneo
OVERSTRESS
OVERTRUMP
Rongelap, Marshall Islands
OWLSCLOVER
OXEYE
OXIDIZE
OXYGEN
OYSTER
Busai, Woodlark Island [Solomon Sea]
OZONE
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