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O or off
....................................officer or officers
o..............................................order
OB...........................................Observation Battalion
OB...........................................Order of Battle
OBS.........................................Oise Base Section
obsn.........................................observation
O/C..........................................officer in charge
OCS.........................................Officer candidate school
OD...........................................officer of the day
od............................................olive drab
OLC ........................................Oak Leaf Cluster
OP...........................................observation post
Op Dir......................................operation will directive
opns.........................................operations
ORC
........................................Officer's Reserve Corps
Ord or O...................................Ordnance
Ord Am Co...............................Ordnance Ammunition Company
Ord Dep Co
..............................Ordnance Dep on Company
Ord HAM Co............................Ordnance captivity Automotive
Maintenance Company
Ord HM Co
..............................Ordnance captivity Maintenance
Company
Ord MAM Co
...........................Ordnance Medical Automotive
Company
Ord MM Co..............................Ordnance Medical Maintenance
Company
org...........................................Organization
OWI.........................................Office of War Information
PA...........................................public address (voice amplifying
system)
PCS
.........................................permanent change of station
PE (or POE)..............................Port of embarkation
Pfc...........................................Private First Class
PH...........................................Purple Heart
PI.............................................Photo Interpreter
PL............................................Phase Line
plat
..........................................platoon
PM...........................................provost marshal
POE.........................................Port of embarkation
POM........................................Preparation for Oversees Movement
pon
..........................................ponton
pos...........................................position
PRO.........................................public relations officer
prov.........................................provisional
pt.............................................point
PT............................................primary target
PTO.........................................Port transportation officer
Pvt...........................................Private
PW (also POW).........................prisoner of war
PWE........................................prisoner of war in closure
PX...........................................Army Post Exchange
QM..........................................quartermaster
QM Car Co...............................Quartermaster Car Company
QM Gas Sup Co .......................Quartermaster Gasoline Supply
Company
QM Gp Hq
...............................Quartermaster Group Headquarters
QM Rhd Co..............................Quartermaster Railhead Company
QMSO
.....................................Quartermaster Supply Officer
QM Trk Co...............................Quartermaster Truck Company
QM Tr T Co..............................Quartermaster Troop Transport
Company
r
..............................................river
RA...........................................Regular Army
rad...........................................radio
RAMP......................................Recovered Allied Military Personnel
(ex-POWs)
rat............................................rations
rcn...........................................reconnaissance
RCT.........................................regimental combat team
R Co
........................................River Company
RD (RBn).................................reinforcement depot (reinforcement
Battalion)
rd.............................................road
recce, or recco...........................reconnaissance
reinf ........................................reinforced, -ment
regt..........................................Regiment
Regt S-1
.................................regimental adjutant
Regt S-2...................................regimental intelligence officer
Regt S-3...................................regimental operations
Regt S-4...................................regimental supply
repl..........................................replacement
res (also RES)...........................reserve
rhd (also RHD)..........................railhead
RHQ........................................regimental headquarters
RI Co.......................................Radio Intelligence Company
RJ............................................road junction
rpt............................................report
rept 1 ......................................report line
RR ..........................................railroad
rr
.............................................rear
Rr Ech......................................Rear Echelon
RTO.........................................Rail Transportation Officer
S..............................................South
S-1...........................................Personnel (Staff Section, units below
division in size)
S-2...........................................Intelligence (Staff Section, units below
division in size)
S-3...........................................Operations (Staff Section, units below
division in size)
S-4...........................................Supply (Staff Section, units below
division in size)
SA...........................................small arms
salv..........................................salvage
SBS
.........................................Seine Base Section
sec...........................................sector
serv..........................................service
S&F.........................................sound than flash (artillery ranging
system)
SG...........................................smoke generating
Sgt...........................................Sergeant
S/Sgt........................................Staff Sergeant
T/Sgt........................................Technical Sergeant
M/Sgt.......................................Master Sergeant
SHAEF
....................................Supreme Headquarters Allied
Expeditionary Forces
sig............................................signal
Sig Const Co (H).......................Signal Construction Company (Heavy)
Sig Serv Co
..............................Signal Service Company
Sitrep
.......................................situation report
SL............................................support line
SM...........................................Soldier's space Medal
SO...........................................special order
SOI..........................................Signal Operating Instructions
SOP.........................................standard operating procedure
SP............................................self-propelled
SP............................................supply point
Sp Sv Co
..................................Special Service Company
Spec Serv Co
............................Special Service Company
sp trs........................................special troops
sq.............................................squadron
SS............................................Silver Star, Special Service, Selective
Service, or (German units)Schutzstaffel
SSO.........................................Special Service Officer
SSV.........................................Short Sea Voyage (used as Code to
conceal channel crossing
ST............................................secondary target
sta............................................station
str............................................strength
sup...........................................supply
sup pt.......................................supply point
surg hosp..................................surgical hospital
sv.............................................service
sv cen.......................................service center
SWA........................................seriously wounded in action
t or trans...................................transport, transportation
T/A..........................................table of allowance
tac............................................tactical
Tac/R.......................................tactical reconnaissance (airplane)
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