Browse Acronyms
Browse the acronym list:
O Listing
O
oxygen (element, Z = 8)
O&G
oil and grease
O&M
– operating and management
– operation and maintenance
O&TS
Operations and Technical Support
O-D
origin-destination
O/M
operation/maintenance
O/O
owner/operator
O2
oxygen
O3
ozone
OA
– office automation
– Office of Independent Oversight and Performance Assurance
– oxygen activation
OA&P
Operations Analysis & Planning Division
OA/DCS
Open Architecture Distributed Control System
OAC
– Ohio Administrative Code
– operational aids computer
OAF
Office of Alcohol Fuels (DOE)
OAG
Official Airline Guide (Travel Department)
OAI
Office of Audit and Inspection
OAII
Ocean-Atmosphere-Ice Interactions (ARCSS)
OAM
oversight assurance memorandum
OAP
off-axis paraboloidal
OAPEC
Organization of Arab Petroleum Exporting Countries
OAQPS
Office of Air Quality Planning and Standards (EPA)
OAR
Office of Air and Radiation (EPA)
OARM
Office of Administration and Resource Management
OARS
OSTI Automated Retrieval System
OAS
– Office Automation System
– Organization of American States
OASD
Office of Assistant Secretary of Defense
OASIS
Online Access Services and Information System (replaced LION)
OB/OD
open burning/open detonation
OBA
operating-basis accident
OBCS
Office of Buildings and Community Systems (DOE)
OBE
operating-basis earthquake
OBES
Office of Basic Energy Sciences
OBT
Office of Building Technologies
OC
– on center
– operating center
– operating contractor
OCA
Organization of Chinese Americans
OCAW
Oil, Chemical, and Atomic Workers International Union
OCCF
Optical Component Characterization Facility
OCD
Office of Civil Defense
OCEP
Office of Contractor Employee Protection (DOE)
OCHP
open-cycle heat pump
OCI
– Office of Counterintelligence (DOE)
– organizational conflict of interest
OCIS
OSHA Computerized Information System
OCL
Optics Characterization Laboratory
OCMT
Operating Contractors Management Team
OCONUS
outside continental United States (see CONUS)
OCPSF
organic chemicals, plastics, and synthetic fibers
OCR
– Operating Cost Report
– optical character reader
– Optical Character Recognition (device)
OCRWM
Office of Civilian Radioactive Waste Management (DOE) (also DOE/RW; also RW)
OCS
Office of Scientific Computing (DOE)
OCSSEM
Office of Central Safeguards, Security, and Emergency Management
OCT
– Office Computing Technologies
– ornithine carbamoyl transferase (or ornithine transcarbamylase)
OCUS
– Office Computing User Services
– Office Computing User Support
OD
– oil dike
– Operations Division (K-25)
– outside diameter
ODC
ornithine decarboxylase
ODNR
Ohio Department of Natural Resources
ODP
ozone-depleting potential
ODRS
Optics Damage and Radiation Studies
ODSR
optical disk storage and retrieval
ODW
Office of Drinking Water (EPA)
OEA
–Office of Economic Adjustment
– Office of Environmental Analysis (DOE)
OEBBS
Operating Experience Bulletin Board System [OESH, Office of Nuclear Safety (DOE)]
OEC
– O-arai Engineering Center (Tokai Works of PNC, Japan)
– Office of Environmental Compliance
OECD
– Office of Environmental Compliance and Documentation
– Organization for Economic Cooperation and Development (formerly OEEC)
OECD/NEADB
Organization for Economic Cooperation and Development/Nuclear Energy Agency Data Bank
OECM
Office of Enforcement and Compliance Monitoring
OEE
Office of Energy Emergencies (DOE)
OEEC
Organization for European Economic Cooperation (now OECD)
OEERE
Office of Energy Efficiency and Renewable Energy (DOE)
OEETD
Office of Environmental Engineering and Technology Demonstration
OEG
Office of Environmental Guidance (DOE)
OEGC
Office of Environmental Guidance and Compliance (DOE)
OEID
Office of Economic Impact and Diversity (DOE)
OEM
– Office of Energy Management
– original equipment manufacturer
OEP
– Office of Electric Power
– Office of Emergency Programs (DOE)
OEPA
– Office of Environmental Policy Analysis
– Ohio Environmental Protection Agency
OER
– oersted [convert to SI: amperes per meter (A/m)]
– Office of Energy Research
OERI
Office of Educational Research and Improvement
OERR
Office of Emergency and Remedial Response
OERTT
Office of Energy Research Technology Transfer (DOE)
OERWM
Office of Environmental Restoration and Waste Management (DOE)
OESD
Office of Energy Systems and Distribution (DOE)
OESH
Office of Environment, Safety and Health (DOE)
OESHC
Office of Environmental, Safety, and Health Compliance
OESHOC
Operations, Environment, Safety, and Health Operating Committee
OETA
Office of Environmental Technology Assessment
OETD
Office of Environmental Technology Development
OEWS
Operating Experience Weekly Summary [Office of Nuclear Safety (DOE)]
OFA
– Office of Financial Analysis (U.S. Department of the Treasury)
– other federal agencies
OFC
Office of Fuels Conversion (ERA-DOE)
OFCCP
Office of Federal Contract Compliance Programs
OFE
Office of Fusion Energy (DOE)
OFHC
oxygen-free, high-conductivity
OFT
operational flight trainer
OGC
Office of General Counsel
OGSCL
Office of Oil, Gas, Shale, and Coal Liquids (DOE/FE)
OGSST
Office of Oil, Gas, Shale, and Special Technologies
OGUI
Office of Guest and User Interactions (ORNL)
OH
– Ohio (use only with ZIP code addresses)
– ohmic heating
OHA
U.S. Department of Energy Office of Hearings and Appeals
OHEA
Office of Health and Environmental Assessment
OHER
Office of Health and Environmental Research (DOE)
OHF
Old Hydrofracture Facility (pond)
Ohio
(do not abbreviate unless used with ZIP code addresses; state name is not needed with Cincinnati or Cleveland)
OHIS
Occupational Health Information System
OHMS
hydroxy melatonin sulfate
OHMT
Office of Hazardous Materials Transportation
OHP
omnidirectional holonomic platform
OHS
Occupational Health Services
OIC
– officer-in-charge
– optical integrated circuit
OIDC
oil-importing developing countries
OIG
Office of Inspector General
OIP
Organizational Improvement Program
OIRM
Office of Information Resources Management Policy, Plans, and Oversight (DOE)
OIRPC
Office for Interagency Research and Policy Coordination
OIT
oxidation induction time
OITS
Open Item Tracking System
OIU
operator interface unit
OJCS
Organization of the Joint Chiefs of Staff
OJT
on-the-job training
OK
Oklahoma (use only with ZIP code addresses)
Okla.
Oklahoma (use after city names in references, lists, tables, footnotes, bibliographies, and indexes; spell out in text; state name is not needed with Oklahoma City)
OL
operating license
OLC
Office of Laboratory Computing (ORNL)
OLE
object linking and embedding
OLP
Office of Laboratory Protection (formerly LPD) (ORNL)
OLS
operating license stage
OLSA
organic liquid storage area
OLU
output logic unit
OM-Al
organic monomeric aluminum
OM/SO
Operations Manager/System Owner
OMA
Office of Military Applications
OMB
– Office of Management and Budget (formerly BOB)
– Office of Military Budget
OMCD
Office of Mobilization and Civil Defense
OMD
Operations Management (Division of YSO)
OMRE
Organic Moderated Reactor Experiment
OMS
organizational maintenance squadron
OMSE
Office of Management Systems and Evaluation (EPA)
OMSQA
Office of Monitoring Systems and Quality Assurance (EPA)
OMV
Orbital Maneuvering Vehicle
ONC
Open Network Computing
ONEP
ORNL National Energy Perspective
ONMSS
Office of Nuclear Material Safety and Safeguards (NRC)
ONOR
off-normal occurrence report
ONPA
Office of NEPA Project Assistance (DOE)
ONR
Office of Naval Research
ONRR
Office of Nuclear Reactor Regulation (NRC)
ONS
– Oconee Nuclear Station
– Office of Nuclear Safety (DOE)
ONWI
Office of Nuclear Waste Isolation (DOE)
OOC
Office of Classification
OOIP
original oil in place
OOP
object-oriented programming
OOR
overall objectives and requirements
OORFS
Office of Operational Readiness and Facility Safety (formerly OORS)
OORS
Office of Operational Readiness and Safety (now OORFS)
OORTS
Official Oak Ridge Telephone System
OOS
Office of Operational Safety
OP
– Office of Operational Safety
– Operations Planning (DOE)
op-amp
operational amplifier
OPAC
On-Line Payment and Collection
OPC
other project costs
OPEC
Organization of Petroleum Exporting Countries
OPEIU
Office and Professional Employees International Union
OPERAD
Optical Processing Enhanced Real-Time Advanced Detection
OPEX
operations expense
OPFM
Office of Project and Facilities Management
OPLAN
Oil and Hazardous Substance Pollution Contingency
OPM
– Office of Personnel Management
– Office of Planning and Management
OPP
Office of Pesticide Programs
OPPA
Office of Policy, Planning, and Analysis
OPPE
– Office of Policy, Planning, and Evaluation (EPA)
– Office of Program Planning and Evaluation
OPPPE
Office of Policy, Planning and Program Evaluation (DOE)
OPRM
– Office of Plans and Resources Management
– oscillation power range monitor
OPRR
Office of Protection from Research Risks
OPS
– Office of Pipeline Safety
– operating system (computer term)
OPSEC
Operations Security (Program)
OPSEC/CI
Operations Security/Counterintelligence
OPSM/UG
Optical Sensing Manufacturers/Utilities Group
OPTS
– Office of Pesticides and Toxic Substances (EPA)
– Order Processing and Tracking System
OQPI
Office of Quality Programs and Inspection (formerly QD)
OR
– Oak Ridge (Tennessee)
– odds ratio
– operating reactor
– Oregon (use only with ZIP code addresses)
OR gate
["OR" is not an abbreviation (see AND gate)]
ORA
– Oak Ridge Area
– Office of Risk Analysis (DOE)
ORACLE
Oak Ridge Automatic Computer and Logic Engine
ORAU
Oak Ridge Associated Universities
ORBRFUR
Oak Ridge Bioprocessing Research Facility User Resource
ORC
Office of Regional Counsel
ORCC
Oak Ridge City Council
ORCHID
Oak Ridge Center for Healthcare Industry Development
ORCHIS
Oak Ridge Computerized Hierarchical Information System
ORCMT
Oak Ridge Centers for Manufacturing Technology
ORCMTD/UF
Oak Ridge Centers for Manufacturing Technology Deployment/User Facility
ORCWDF
Oak Ridge Central Waste Disposal Facility (proposed)
ORD
Office of Research and Development (EPA)
ORDC
Oak Ridge Detector Center (ORNL, established January 1990)
ORDTN
Oak Ridge Dataphone Teletypewriter Network
OREA
Office of Economic Adjustment
Oreg.
Oregon (use after city names in references, lists, tables, footnotes, bibliographies, and indexes; spell out in text)
OREIS
Oak Ridge Environmental Information System
ORELA
Oak Ridge Electron Linear Accelerator
OREN
Oak Ridge Educational Network
OREOC
Oak Ridge Emergency Operations Center
OREPA
Oak Ridge Environmental Peace Alliance
OREQAB
Oak Ridge Environmental Quality Advisory Board
ORF-ICN
Oak Ridge Federal-Integrated Communications Network
ORFEA
Oak Ridge Federal Employees Association
ORFTF
Oak Ridge Filter Test Facility
ORG
Operations Review Group
ORGDP
Oak Ridge Gaseous Diffusion Plant (now East Tennessee Technology Park)
ORGSBS
Oak Ridge Graduate School of Biomedical Sciences
ORHASP
Oak Ridge Health Agreement Steering Panel
ORHS
Oak Ridge Health Studies Agreement
ORHSP
Oak Ridge Hydrology Support Program
ORIAD
Oak Ridge Immediate Action Directive
ORIC
Oak Ridge Isochronous Cyclotron
ORIGEN
Oak Ridge Isotope Generation and Depletion Code
ORIM
Oak Ridge Industrial Model (for chemicals and petroleum)
ORINS
Oak Ridge Institute for Nuclear Studies (now ORAU)
ORION
Oak Ridge Isochronous Observation Network
ORISE
Oak Ridge Institute for Science and Education
ORM
– occurrence reporting manager (ORNL)
– other regulated material
ORMAK
Oak Ridge Tokamak
ORMC
Oak Ridge Metrology Center
ORMMP
Oak Ridge Materials Management Plan
ORMWI
Oak Ridge Mixed Waste Incinerator (K-25 Site)
ORNL
Oak Ridge National Laboratory (preferred over "X-10")
ORNL/TM
Oak Ridge National Laboratory/Technical Memorandum
ORO
Oak Ridge Office (DOE) (formerly Oak Ridge Operations Office)
ORO-PAD
Oak Ridge Operations Office, Paducah (DOE), historical term
ORO-PORT
Oak Ridge Operations Office, Portsmouth (DOE), historical term
ORP
– Occurrence Reporting Program (ORNL)
– Office of Radiation Protection (ORNL)
– On-Site Remediation Program
– Operational Readiness Process
ORPD
Oak Ridge Police Department
ORPM
Occurrence Reporting Program Manager
ORPS
Occurrence Reporting and Processing System
ORR
– Oak Ridge Research Reactor
– Oak Ridge Reservation
– Operational Readiness Review
ORRDAC
Oak Ridge Research Reactor data acquisition system
ORREC
Oak Ridge Regional Education Center (ORNL)
ORREMSSAB
Oak Ridge Reservation Environmental Management Site-Specific Advisory Board (ORREMSSAB Web Site)
ORRHAGS
Oak Ridge Reservation Hydrology and Geology Study
ORRI
Oak Ridge Research Institute
ORRMIS
Oak Ridge Regional Molding Information System
ORRSF
Oak Ridge Reservation Site Facility
ORRSS
Oak Ridge Reservation Swap Shop
ORRWTB
Oak Ridge Research Web Test Bed
ORS
Occurrence Reporting System
ORSA
Operations Research Society of America
ORSAM
ORNL spatial analysis model
ORSEC
Oak Ridge Science Education Center
ORSENS
Oak Ridge Systems for Enhancing Nuclear SafeguardsTM
ORSERS
Oak Ridge Science and Engineering Research Semester
ORSOAR
Oak Ridge Synchrotron Organization for Advanced Research
ORSORT
Oak Ridge School of Reactor Technology
ORT
Operational Readiness Team
ORTA
Office of Research and Technology Applications
ORTI
Oak Ridge Transportation Initiative
ORTRAN
Oak Ridge Transportation Technology Center
ORV
off-road vehicle
ORVIP
Oak Ridge Valley Industrial Park
ORWMA
Oak Ridge Waste Management Association
Os
osmium (element, Z = 76)
OS&H
operations safety and health
OSA
Optical Society of America
OSAE
on-site architect-engineer
OSB
Operational Safety Board (sometimes Operations Safety Board)
OSC
– Office of Scientific Computing (DOE)
– on-scene coordinator
– open-space conservation
– operational support center
– operations support center
OSCP
on-scene command post
OSD
– Office of Standards Development (NRC)
– Office of the Secretary of Defense
OSE
– Office of Safeguards Evaluations
– Office of Security Evaluation
OSEER
Office of Science Education and External Relations (ORNL)
OSEPER
Office of Science Education Programs and External Relations
OSF
Open Software Foundation (consortium)
OSFRI
Open Software Foundation Research Institute
OSH
occupational safety and health
OSH/WPP
Occupational Safety and Health Worker Protection Pilot (program of DOE)
OSHA
– Occupational Safety and Health Act of 1970
– Occupational Safety and Health Administration
OSHP
Office of Safety and Health Protection
OSHRKS
Occupational Safety and Health Record Keeping System
OSI
– Office of Special Investigations
– open system interconnect
OSIM
Open Systems Implementation and Migration (C&TS)
OSL
Operation Source Language
OSLAP
Office of State and Local Assistance Programs (DOE)
OSM
Office of Surface Mining (DOI)
OSPIC
Oil Spill Public Information Center
OSR
– Operational Safety Report
– operational safety requirement
OSS
– Office of Safeguards and Security
– Office of Statistical Standards (DOE)
– off-the-shelf software
– Order Status Screen
OSTC
Office of Scientific and Technical Computing
OSTI
Office of Scientific and Technical Information (DOE) (formerly TIC)
OSTP
Office of Science and Technology Policy
OSTS
Office of Storage and Transportation Systems
OSW
– Office of Saline Water
– Office of Solid Waste (EPA)
OSWER
Office of Solid Waste and Emergency Response (EPA)
OSWP
Operations Safety Work Permit
OSWRA
Office of Solid Waste and Remedial Actions
OT&E
Operations Training and Evaluations
OTA
– Office of Technology Alliances
– Office of Technology Applications (DOE)
– Office of Technology Assessment (U.S. Congress)
OTC
Office of the Controller
OTD
Office of Technology Development (DOE)
OTDR
optical time-domain reflectometry
OTEC
ocean thermal energy conversion
OTF
optical transfer function
OTM
– Oil Tank Model
– Oil Trade Model
OTO
one-third octive
OTP
operational test plan
OTS
– Office of Toxic Substances (EPA)
– Office of Transportation Systems (DOE)
OTSG
once-through steam generator
OTSP
Office of Transportation Systems Planning
OTT
– Office of Technology Transfer
– Office of the Treasurer
OTV
Orbital Transfer Vehicle
OU
operable unit
OUO
Official Use Only
OURE
Office of Uranium Resources and Enrichment (DOE)
OUST
Office of Underground Storage Tanks
OVA
organic vapor analyzer
OVEC
Ohio Valley Electric Corporation
OVT
operational verification testing
OWCP
Office of Workers Compensation Program
OWFD
Office of Work Force Diversity (formerly EEO organization)
OWI
Office of Waste Isolation
OWP
Office of Weapons Production
OWPE
Office of Waste Programs Enforcement
OWR
Omega West Reactor
OWRDP
Office of Waste Research and Development Programs (ORNL)
OWRT
Office of Water Research and Technology (DOI)
OWS
oil/water separator
Oy
oralloy
oz
ounce, avoirdupois (16 oz = 1 lb) [convert to SI: kilogram (kg) for solids; cubic meter (m3) for liquid, which is preferred over liter; see restrictions listed under "L" for "liter"]
oz ap
ounce, apothecary (12 oz ap = 1 lb) [convert to SI: kilogram (kg) for solids; cubic meter (m3) for liquid, which is preferred over liter; see restrictions listed under "L" for "liter"]
oz t
ounce, troy (12 oz t = 1 lb) [convert to SI: kilogram (kg) for solids; cubic meter (m3) for liquid, which is preferred over liter; see restrictions listed under "L" for "liter"]
ω
ohm
ω · cm
ohm centimeter
ω · m
ohm meter
ω-ft
ohm foot [convert to SI: ohm centimeter (ω · cm)]