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O O&I operations and intelligence
(FM 3‑21.20, FM 3‑90.6) O&M operation and maintenance;
organization and methods O&MFH operation and maintenance, family
housing O/C observer/controller (ARTEP 7‑94‑MTP) O/G observer grid (FM 3‑22.1) O/O on
order (FM 1‑02) O/P ownership/purpose code OA objective
area (FM 1‑02); on or about OAD operational availability data;
ordered to active duty OAKOC observation
and fields of fire, avenues of approach, key terrain, obstacles, and cover
and concealment OARB OAS Organization of American States;
offensive air support (FM 1‑02) OAT operational acceptance test ob obsolete (use abbreviations only
in graphics) obj objective (FM 1‑02);
object; obstacle (ARTEP 7‑91‑Drill (ARTEP 7‑91‑ object (computers) All visual screen
elements such as buttons, text, graphics, All objects have properties and may
have program code. In object‑oriented programming, the objects range
from human beings (described by name, address, and so on.) to buildings and
floors (whose properties can be described and managed) down to the visual
element on your computer desktop (such as buttons and scroll bars), (TRADOC
Pam 350‑70‑2) objective (DOD)
1. The clearly defined, decisive, and attainable goals towards which every
military operation should be directed. 2. The specific target of the action taken (for example, a
definite terrain feature, the seizure or holding of which is essential to the
commander's plan, or, an enemy force or capability without regard to terrain
features; NATO) The physical object of the action taken, for example, a
definite tactical feature, the seizure and/or holding of which is essential
to the commander's plan (Army) 1. One of the nine principles of war:
Direct every military action toward a clearly defined, decisive, and
attainable objective (FM 3‑0) 2. A location on the
ground used to orient operations, phase operations, facilitate changes of
direction, and provide for unity of effort (FM 3‑90) See also decisive point; principles of war; target. (See Table 7‑10 for symbol) objective force (obsolete; use 'future force'
instead) object‑oriented programming A program consisting of modular
chunks interact with each other and can be reused with little modification if
any in other programs) OBLAUTH obligation authority oblg obligate (use abbreviations only
in graphics) obs obstacle (ARTEP 7‑91‑Drill
(use abbreviations only in graphics) obs num observer
number (FM 3‑22.91) obscurant A
chemical agent that decreases the energy available for the functions of
seekers, trackers, and vision enhancement devices (FM 3‑50) obscuration The
effects of weather, battlefield dust, and debris, or the use of smoke
munitions to hamper observation and target‑acquisition capability or to
conceal activities or movement (FM 3‑50) obscuration smoke Smoke
placed on or near enemy positions to minimize enemy observation both within
and beyond the position area (FM 3‑50) observation post (DOD, NATO) A
position from which military observations are made, or fire directed and
adjusted, and which possesses appropriate communications; may be airborne. Also called OP, FM 3‑90. (See Table 7‑9 for symbol) observed fire (DOD,
NATO) Fire for which the point of impact or burst can be seen by an observer.
The fire can be controlled and adjusted on the basis of observation, also fire, FM 6‑30) observer‑target line (DOD,
NATO) An imaginary straight line from the observer/spotter to the target, FM 6‑30) obsn observation (use abbreviations
only in graphics) obstacle (DOD)
Any obstruction designed or employed to disrupt, fix, turn, or block the
movement of an opposing force, and to impose additional losses in personnel,
time, and equipment on the opposing force. Obstacles can be natural, manmade,
or a combination of both, also reinforcing
obstacles, FM 90‑7. (See Table 7‑14 for symbol) obstacle belt (DOD)
A brigade‑level command and control measure, normally given
graphically, to show where within an obstacle zone the ground tactical
commander plans to limit friendly obstacle employment and focus the defense.
It assigns an intent to the obstacle plan and
provides the necessary guidance on the overall effect of obstacles within a
belt, also obstacle, FM 3‑90. (See Table 7‑14 for symbol) obstacle control measures Specific
measures that simplify the granting of obstacle‑emplacing authority
while providing obstacle control (FM 3‑90) obstacle groups One
or more individual obstacles grouped to provide a specific obstacle effect (FM 3‑90) obstacle line A conceptual
control measure used at battalion or brigade level to show placement intent
without specifying a particular type of linear obstacle (FM 90‑7; see Table 7‑14 for symbol) obstacle
restricted areas (DOD)
A command and control measure used to limit the type or number of obstacles
within an area, also obstacle,
FM 90‑7. (See Table 7‑14 for symbol) obstacle zone (DOD) A division‑level
command and control measure, normally done graphically, to designate specific
land areas where lower echelons are allowed to employ tactical obstacles,
also countermobility operations; obstacle, FM 3‑90. (See Table 7‑14 for symbol) OBSTINTEL obstacle intelligence (FM 3‑90.1) OBT observer training obturator (noun) something that closes or
blocks an opening, Merriam‑Webster online 2002) OC officer candidate; operations
central; observer‑controller (ARTEP 7‑20‑MTP) OCA Office of the Comptroller of the
Army; operational control authority; offensive counterair (FM 1‑02) OCAR Office of the Chief, Army Reserve OCAS Office, Coordinator of Army
Studies OCB Operations Coordinating Board OCC operational control console OCCH Office of the Chief of Chaplains OCCIS Operational Command and Control
Intelligence System OCCMED occupational medicine OCCS operational command and control
system occupied** Ground equipment present at tasked
target location. Opposite of VACANT) occupy A
tactical mission task that involves a force moving into an area so that it
can control the entire area. Both the force's movement to and occupation of
the area occur without enemy opposition (FM 3‑90; see Table A‑1 for symbol) OCE Office of the Chief of Engineers;
officer conducting the exercise OCHAMPUS Office for the Civilian Health
and Medical Program of the Uniformed Services OCL operator's checklist (FM 3‑22.34) OCLL Office of the Chief of
Legislative Liaison OCM on‑condition maintenance OCMH Office of the Chief of Military
History OCO operational capability objective OCOKA (Obsolete; replaced by OAKOC) OCONUS outside continental OCP Office of Civilian Personnel;
operational capability plan OCPA Office of the Chief of Public
Affairs OCR optical character recognition,
(TRADOC Pam 350‑70‑2); optical character reader OCRE optical character recognition
equipment OCSA Office of the Chief of Staff, Oct October (use abbreviations only
in graphics) OCT Officer Candidate Test OD officer of the day; Ordnance Corps;
olive drab (FM 3‑23.30, FM 3‑21.220) ODCSOPS Office of the Deputy Chief of Staff
for Operations and Plans (FM 1‑02) ODCSPER Office of the Deputy Chief of
Staff for Personnel ODCSRDA Office of the Deputy Chief of
Staff for Research, Development, and Acquisition ODDRE Office of Director of Defense
Research and Engineering ODP officer development program
(ARTEP 71‑2‑MTP) ODRI Office of United States Defense
Representative, ODRP Office of Defense ODS ODSCLOG Office of the Deputy Chief of
Staff for Logistics ODSS offense,
defense, stability, and support (FM 1‑02) ODT overseas deployment for training
(FM 7‑0) ODTS optical discrimination and
tracking system ODWSA Office of the Directorate of
Weapon Systems Analysis OE organizational effectiveness; operational environment OEA organizational expense accounts OEC operational employment concept OEF Operation "Enduring
Freedom" OEG operation
exposure guide (not guidance,
FM 1‑02); organization and equipment guide OEL organizational equipment list OEM on equipment materiel OEP Office of Emergency Planning;
operational employment plan OER officer evaluation report OERS officer evaluation reporting
system OES open
enterprise server; Office of Emergency Services; Officer Education System OET Office of Emergency
Transportation OF optional form (DA Pam 25-40) ofc office (use abbreviations only in
graphics) OFEC Office of Federal Employees'
Compensation OFF (direction) Informative
call indicating attack is terminated and maneuvering to the indicated
direction) offensive One
of the nine principles of war: Seize, retain, and exploit the initiative,
also principles of war (FM 3‑0) offensive
air support (Army) That part of
tactical air support of land operations that consists of tactical air
reconnaissance and close air support, which are conducted in direct support
of land operations (FM 3‑04.111; Marine Corps) Those
air operations conducted against enemy installations, facilities, and
personnel to directly assist the attainment of MAGTF objectives by the
destruction of enemy resources or the isolation of the enemy's military
forces. Also
called OAS (FM 1‑02) offensive counterair (DOD)
Offensive operations to destroy, disrupt, or neutralize enemy aircraft,
missiles, launch platforms, and their supporting structures and systems both
before and after launch, but as close to their source as possible. Offensive
counterair operations range throughout the enemy territory and are generally conducted at the initiative of friendly
forces. These operations include attack operations, fighter sweep, escort,
and suppression of enemy air defenses. Also called offensive counterspace Combat
operations conducted against enemy systems (or their support systems)
designed to operate in space (for example, a directed‑energy weapon
operating from an aircraft or ground location that is used to destroy enemy
satellites) Also called OCS (FM 44‑100) offensive
information operations (DOD) The integrated use of assigned and
supporting capabilities and activities, mutually supported by intelligence,
to affect adversary decisionmakers to achieve or promote specific objectives.
These capabilities and activities include, but are not limited to, operations
security, military deception, psychological operations, electronic warfare,
physical destruction, and special information operations, and could also
include computer network attack (Army) The integrated use of assigned and
supporting capabilities and activities, mutually supported by intelligence,
to affect enemy decisionmakers or to influence others to achieve or promote
specific objectives, also computer
network attack; defensive
information operations;
electronic warfare; information
operations; intelligence; military deception; operations security; psychological operations (FM 3‑0) offensive
operations Operations which aim at
destroying or defeating an enemy. Their purpose is to impose off‑load (trans verb, Third New
International Dictionary, Unabridged) offloaded (adj) offset (direction) Directive/informative
call indicating maneuver in a specified direction with reference to the
target) OFGR objective force gross requirement OFT observed fire trainer OG officer of the guard OGA other
governmental agency (FM 3‑21.20) OH observation helicopter (FM 3‑21.20,
FM 3‑90.6, ARTEP 7‑20‑MTP, ARTEP 71‑2‑MTP) OHMP (US Army) Oral Health Maintenance
Program OI operating instructions;
operations and intelligence (FM 3‑21.20) OIC officer in charge (of) OICC officer in charge of construction OICW objective individual combat
weapon OIDP Overseas Internal Defense Policy OIF Operation Iraqi Freedom oilfield [NATO]
Activated friendly MEX. Opposite of KOBOLD) OIPAAR Office of Industrial Personnel
Access Authorization Review OIR other intelligence requirements OIS operating information system OISP overseas internal security
program OJT on‑the‑job training okay (system) system
indicated is fully operative (cancels BENT) OL operating level; operating
location OLC oak leaf cluster OLF outlying field OLS optical landing system OLSS overseas limited storage site OMA operation and maintenance, Army OMAR operation and maintenance, Army
Reserve OMARNG operation and maintenance, Army
National Guard OMB Office of Management and Budget OMF officer master file; operation
and maintenance of facilities OMFBAA operation and maintenance of
facilities budget activity account OMFCA operation and maintenance of
facilities cost account OMFSCA operation and maintenance of
facilities summary cost account OMIS office, management information
systems OML order of merit list OMPF official military personnel file OMPR optical mark page reader OMVTO office, motor vehicle
transportation officer on call (adj) on station Informative
call that unit/aircraft has reached assigned station) onboard (adj, MW10) ONC operational navigation chart on‑call (DOD)
1. Term used
to signify that a prearranged concentration, air strike, or final protective
fire may be called for. 2. Preplanned, identified force or
materiel requirements without designated time‑phased and destination
information. Such requirements will be called forward upon order of
competent authority, also call for
fire, FM 6‑30) on‑call resupply (DOD)
A resupply mission planned before insertion of a special operations team into
the operations area but not executed until requested by the operating team,
also emergency resupply, FM 3‑05) on‑call target (NATO)
In artillery and naval fire support, a planned target other than a scheduled
target on which fire is delivered when requested. [Note: the Army definition
also applies to mortar fire.] See FM 6‑30) one
day's supply (DOD,
NATO) A unit or quantity of supplies adopted as a standard of measurement,
used in estimating the average daily expenditure under stated conditions. It may also be expressed in terms of a factor, for example,
rounds of ammunition per weapon per day. Also called day of supply, 4‑0, FM 1‑02) OneSAF one
semiautomated force; platform-independent, automated, composable, extensible,
and interoperable software, used to create modeling and simulation programs
with military applications; replaces legacy entity-based simulations such as
BBS, ModSAF, JANUS, CCTT SAF, and AVCATT SAF on‑hand (adj, MW9) ONI Office of Naval Intelligence on‑order
mission A mission to be
executed at an unspecified time in the future. A unit with an on‑order
mission is a committed force. The commander envisions task execution in the
concept of operations; however, he may not know the exact time or place of
execution. Subordinate commanders develop plans and orders and allocate
resources, task‑organize, and position forces for execution, also be‑prepared mission (FM 5-0) ONR Office of Naval Research ONS operational need statements on‑site (adj, adv, MW9) OO on order OOAMA office, OOB order
of battle (FM 1‑02) OOM officers' open mess OOSS overseas operational storage site OOTW operations other than war
(obsolete; replaced by SASO,
which is also obsolete; see stability
and reconstruction operations/civil support operations) op operate(d), operation(al),
operator (use abbreviations only in graphics) OP observation post, operational
project (FM 1‑02) OPA other procurement, Army OpACK operationally acknowledge (FM 3‑22.91; see also OpOUT, OpRDY, |