Category:Articles with MA identifiers
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This is a maintenance category, used for maintenance of the Wikipedia project. It is not part of the encyclopedia and contains non-article pages, or groups articles by status rather than subject. Do not include this category in content categories.
This is a tracking category. It builds and maintains a list of pages primarily for the sake of the list itself. They are not part of the encyclopedia's categorization scheme.
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Pages in this category should only be added by Module:Authority control.
Pages in category "Articles with MA identifiers"
The following 200 pages are in this category, out of approximately 45,744 total. This list may not reflect recent changes (learn more).
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- Oogenesis
- Oology
- Opah
- OPEC Fund for International Development
- Opel
- Open access
- Open Archives Initiative
- Open cluster
- Open Database Connectivity
- Open Document Architecture
- Open Geospatial Consortium
- The Open Group
- Open hearth furnace
- Open International University of Human Development "Ukraine"
- Open learning
- Open market operation
- Open outcry
- Open data
- Open Shortest Path First
- Open society
- Open Society Foundation for South Africa
- Open Society Foundations
- Open Source Geospatial Foundation
- Open-source intelligence
- Open Universities Australia
- Open University
- Open University Malaysia
- Open University of Catalonia
- Open University of China
- Open University of Cyprus
- Open University of Israel
- The Open University of Japan
- Open University of Sri Lanka
- Open University of Tanzania
- Open University of the Netherlands
- Open-end fund
- Open-field system
- Open-loop controller
- OpenDocument
- OpenText
- Opera
- Operating cost
- Operating reserve
- Operating system
- Operating theater
- Operational amplifier
- Operational calculus
- Operational planning
- Operational risk
- Operational risk management
- Operational semantics
- Operationalization
- Operations research
- Operator algebra
- Operator overloading
- Operon
- Operophtera fagata
- Opet
- Ophelimity
- Opheodrys
- Ophiocordyceps sinensis
- Ophioglossidae
- Ophiolite
- Ophiuchus
- Ophrys insectifera
- Ophthalmic artery
- Ophthalmic nerve
- Ophthalmology
- Ophthalmoparesis
- Ophthalmoscopy
- Opiliones
- Opinion leadership
- Opinion piece
- Opinion poll
- Opinion Research Corporation
- Opioid
- Opisthobranchia
- Opium
- Opole University of Technology
- Opossum
- Opponens digiti minimi muscle of hand
- Opponens pollicis muscle
- Opportunism
- Opportunity cost
- Opportunity International
- Opposed-piston engine
- Oppression
- OPS5
- Optech
- Optic canal
- Optic chiasm
- Optic cup (anatomical)
- Optic cup (embryology)
- Optic disc
- Optic nerve
- Optic radiation
- Optic stalk
- Optic tract
- Optic vesicle
- Optical aberration
- Optical amplifier
- Optical cavity
- Optical character recognition
- Optical coating
- Optical communication
- Optical disc
- Optical fiber
- Optical illusion
- Optical instrument
- Optical microcavity
- Optical microscope
- Optical power
- Optical pumping
- Optical rotation
- Optica (society)
- Optical spectrometer
- Optical storage
- Optician
- Optics
- Optimal control
- Optimal stopping
- Optimality Theory
- Optimism
- Optimization problem
- Opto-isolator
- Optoelectronics
- Optometry
- Or Yarok
- Ora serrata
- Oral history
- Oral hygiene
- Oral literature
- Oral medicine
- Oral microbiology
- Oral mucosa
- Oral pontine reticular nucleus
- Oral Roberts University
- Oral tradition
- Oran 1 University
- Orange (colour)
- Orange Coast College
- Orange Coast Memorial Medical Center
- Orange County Health Department
- Orange Polska
- Orange S.A.
- Orange UK
- Orangutan Foundation International
- Oranim Academic College
- Orano Cycle
- Oratorio
- Orb-weaver spider
- Orbicularis oculi muscle
- Orbicularis oris muscle
- Orbifold
- Orbis International
- Orbit
- Orbital gyri
- Orbital hybridisation
- Orbital maneuver
- Orbital mechanics
- Orbital part of inferior frontal gyrus
- Orbital septum
- Orbitalis muscle
- Orbivirus
- Orca Basin
- Orchard
- Orchidaceae
- Orchiectomy
- Order (biology)
- Order (group theory)
- Order book
- Order of battle
- Order of magnitude
- Order of succession
- Order theory
- Orderliness
- Ordinal number
- Ordinary differential equation
- Ordnance Survey
- Ordovician
- Ordu University
- Örebro University
- Oregano
- Oregon Coast Community College
- Oregon College of Art and Craft
- Oregon College of Oriental Medicine
- Oregon Department of Corrections
- Oregon Department of Education
- Oregon Department of Environmental Quality
- Oregon Department of Fish and Wildlife
- Oregon Department of Forestry
- Oregon Department of Geology and Mineral Industries
- Oregon Department of Human Services
- Oregon Department of Land Conservation and Development
- Oregon Department of State Lands
- Oregon Department of Transportation
- Oregon Health & Science University
- Oregon Health Authority
- Oregon Historical Society
- Oregon Institute of Technology