Special:All Pages (O)
From Wikipedia, the free encyclopedia
- Oriana Fallaci
- Om mani padme hum
- Oneida Community
- OpenMP
- Oppositional defiant disorder
- Open Archives Initiative Protocol for Metadata Harvesting
- Occult
- Origami
- Open source hardware
- Ovarian cyst
- Object-oriented programming
- Orthographic projection
- Outer space
- One-time pad
- Orthography
- Open source
- OSx86
- Osteoporosis
- Orion (constellation)
- Orange Revolution
- OpenTTD
- Origin of language
- Open-Xchange
- OpenMicroBlogging
- Oyster card
- Optical illusion
- Oprah's Book Club
- Osama bin Laden
- Odin
- Object relations theory
- Oil refinery
- OpenWrt
- Open Source Initiative
- OpenStreetMap
- Ontological argument
- Oral allergy syndrome
- Okapi BM25
- Oradour-sur-Glane
- Object Constraint Language
- Omega point
- Olympic Games
- Orpheus
- Orlistat
- Oskar Fischinger
- O'Reilly Media
- OpenSimulator
- Orgone
- Ophiuchus
- Orkut
- Open Society Institute
- OpenGL ES
- Ownership equity
- Outer Space Treaty
- Onion routing
- Oedipus complex
- openSUSE
- Overclocking
- OpenEXR
- OpenLaszlo
- Operation Wrath of God
- Open Content Alliance
- Orisha
- Owsley Stanley
- Office Space
- Orson Welles
- Open spectrum
- Omega Point (Tipler)
- Onsen
- Oracle Application Express
- Oracle Corporation
- Opportunity cost
- Oprah Winfrey
- Obsessive love
- Observer pattern
- Online algorithm
- O RLY?
- Open Handset Alliance
- Optics
- OpenSSL
- Organelle
- Orbital elements
- Ottawa
- One and Three Chairs
- OpenOffice.org Base
- Online banking
- Observable universe
- Oscar Pistorius
- Ogham
- On Liberty
- Order of operations
- Object-relational database
- openEHR
- Odyssey
- Organization
- One Hundred Years of Solitude
- OLE Automation
- Okurigana
- Opium
- OpenType
- Object Linking and Embedding
- OTRS
- O Fortuna
- Ocean thermal energy conversion
- Open Database Connectivity
- On Kawara
- Objective-C
- Omega-3 fatty acid
- Offal
- Omnipotence paradox
- OGame
- Oswald Spengler
- Online judge
- Opera
- On the Jews and Their Lies
- Oblique Strategies
- Obsidian
- Office of Strategic Services
- Ortolan Bunting
- Order of the Garter
- OpenBSD security features
- Orders of magnitude (length)
- Oscar Peterson
- Oxytocin
- Objectivity (journalism)
- Oscilloscope
- Ouroboros
- Oil phase-out in Sweden
- Oxford English Dictionary
- OpenLDAP
- Oobleck
- OpenSearch
- Open access journal
- OODA Loop
- Omeprazole
- Ornette Coleman
- Organic food
- Odds ratio
- On Intelligence
- OpenSSH
- Object-relational impedance mismatch
- Operational risk
- Othello
- O Captain! My Captain!
- Organizational structure
- Operation Paperclip
- Orientalism
- Oekaki
- Online journalism
- Organ transplant
- Ozone depletion
- osCommerce
- Ombudsman
- Otaku
- Omakase
- Organizational communication
- Outliner
- Open source software
- Open Shortest Path First
- OpenDNS
- Operation Downfall
- Open source religion
- Open Space Technology
- Open content
- Omidyar Network
- Offshoring
- Operation Mindfuck
- Operation Snow White
- Opus Dei
- Open Clip Art Library
- Open/closed principle
- OpenSound Control
- Oracle machine
- one red paperclip
- OpenCV
- Operation Enduring Freedom
- Optimization (computer science)
- October Revolution
- Open Source Intelligence
- Ogden Nash
- Openbox
- Online gambling
- Ovid
- Offshore bank
- Open politics
- Optical flow
- Object-oriented analysis and design
- Opteron
- Oil reserves
- OpenUP/Basic
- Operating system-level virtualization
- Olduvai theory
- Overtone singing
- OK Go
- OASIS (organization)
- Outlier
- Object-relational mapping
- Ozymandias
- Orson Scott Card
- OpenSolaris
- Operations research
- openMosix
- Odysseus
- Oz (programming language)
- Out-of-place artifact
- Organizational studies
- Odilon Redon
- Orthostatic hypotension
- One-time password
- Outsourcing
- Otto Dix
- OS/2
- Oregon
- Oktoberfest
- Online music store
- Object Management Group
- Of Mice and Men
- Osamu Tezuka
- Operational amplifier
- OLPC XO-1
- ODESSA
- Ogg
- Okay
- OhmyNews
- Off-by-one error
- Og Mandino
- OSI model
- OpenDocument
- Ophcrack
- Operation Mockingbird
- Organic farming
- Openmoko
- Onomatopoeia
- Open source license
- Obsessive-compulsive personality disorder
- Ox (zodiac)
- Orexin
- Out-of-body experience
- OpenBSD
- Oedipus the King
- Open educational resources
- Oskar Schindler
- OPV AIDS hypothesis
- Open design
- Open access (publishing)
- Open standard
- Orders of magnitude (time)
- OLE for process control
- Otto Weininger
- Online dating service
- OAuth
- OpenGL
- Open University
- Obfuscated code
- OpenVPN
- Online Certificate Status Protocol
- Object role modeling
- Odds
- Oliver Sacks
- Optimization (mathematics)
- Olestra
- Ocicat
- OpenUP
- Operation Bernhard
- Open proxy
- OpenURL
- Osteopathy
- Optical character recognition
- Orthokeratology
- Ojibwa
- Originalism
- Open Archival Information System
- Open society
- Operations management
- Online analytical processing
- Olivier Messiaen
- OSGi
- Organized crime
- Ornithopter
- Online advertising
- One-way function
- Open Mobile Alliance
- OpenSocial
- Occitan language
- Otl Aicher
- Orientalism (book)
- Operating system
- OZONE
- Open Letter to Hobbyists
- Open Geospatial Consortium
- Ontology language
- Organic computing
- Online magazine
- Order (exchange)
- Operation Entebbe
- Omorashi
- Oryx and Crake
- Ontology
- Otherkin
- Ouija
- Office Open XML
- OpenCL
- OPEC
- Oligopoly
- Oxidative stress
- Occam's razor
- Other
- Our Band Could Be Your Life
- OpenDoc
- OmniGraffle
- OpenCms
- Open Packaging Convention
- Oxyrhynchus
- Orange (fruit)
- Open access
- Operation Northwoods
- Open Archives Initiative
- Optical phenomenon
- Osborne effect
- Orbitofrontal cortex
- OLAP cube
- Oscar Wilde
- Object database
- Op art
- Odessa
- Object composition
- Obesity
- Orwellian
- One-child policy
- Option (finance)
- Oracle Database
- Organizational culture
- Otto Neurath
- OpenJDK
- OK Soda
- Octopus card
- OWASP
- Optical fiber
- Oil platform
- Ottoman Empire
- Old Norse
- Onigiri
- OpenOffice.org
- Oulipo
- Operation Gladio
- Official gold reserves
- OSCAR protocol
- Organizational learning
- Odic force
- Octree
- Open Directory Project
- Organic light-emitting diode
- Orb (software)
- Obscurantism
- Oxymoron
- On the Road
- Oak Island
- OpenID
- Oxyhydrogen
- Ontology editor
- Ordo Templi Orientis
- Ota Benga
- Outline
- Octopus
- OpenCable Application Platform
- OpenDocument software
- Operational amplifier applications
- Overlay network
- Orthorexia nervosa
- Online identity
- Open Firmware
- Orrery
- Our Lady of Guadalupe
- Original equipment manufacturer
- Ocarina
- Occupational therapy
- Over-the-counter (finance)
- Oware
- Overpopulation
- Olaudah Equiano
- Online questionnaires
- Open eBook
- Oliver Cromwell
- Open Dynamics Engine
- Our Common Future
- OpenAL
- Olmec
- Ostinato
- Orthogonal matrix
- OpenCourseWare
- OpenVMS
- OpenCola
- OpenArena
- Oldboy
- Origins of the American Civil War
- Oscar Zeta Acosta
- Origami techniques
- On-Line Encyclopedia of Integer Sequences
- Open Journal Systems
- Ontology (information science)
- On-board diagnostics
- Off-the-Record Messaging
- Oceania
- One instruction set computer
- Operational definition
- Organic chemistry
- Osteoarthritis
- Open Workbench
- Ohm's law
- O'Neill cylinder
- Oxycodone
- Olbers' paradox
- Operation Condor
- Olaf Stapledon
- Ouran High School Host Club
- Opium Wars
- Order theory
- Ogallala Aquifer
- OpenVZ
- One Piece
- Okapi
- OLE DB
- Once (film)
- Offset printing
- Office of Strategic Influence
- Object recognition
- Orgasm
- Oasis (band)
- Organizational storytelling
- Offender profiling
- Optical fiber connector
- Orion's Arm
- Order of magnitude
- Osho
- Otto von Bismarck
- Oracle RAC
- Ondes Martenot
- One Laptop per Child
- Obsessive-compulsive disorder
- Orion (spacecraft)
- Oxygen radical absorbance capacity
- Open business
- Operation Barbarossa
- OMA DRM
- One-hit wonder
- Optimistic concurrency control
- Orthomolecular medicine
- OpenStep
- Osiris
- Oil shale
- Open Financial Exchange
- Orienteering
- Oort cloud
- Outsider art
- Oligarchy
- Online deliberation
- Operant conditioning
- Open theism
- Open innovation
- Oscar Niemeyer
- Orthogonal frequency-division multiplexing
- OmegaT
- Odyssey 5
- OPML
- Oklahoma City bombing
- Orhan Pamuk
- Oslo Accords
- Okonomiyaki
- OS-tan
- Objectivism (Ayn Rand)
- Olfaction
