Terms with O
- OAS countries
- oats
- Obalno-kraška
- objections to an election result
- observation
- observer
- obsolete technology
- obstacle to development
- occupational accident
- occupational accident insurance
- occupational disease
- occupational health
- occupational medicine
- occupational migration
- occupational mortality
- occupational physiology
- occupational psychology
- occupational safety
- occupational status
- occupied territory
- ocean
- Oceania
- oceanography
- OECD
- OECD countries
- offal
- offence
- offer price
- office automation
- office equipment
- Office for Harmonization in the Internal Market
- office supplies
- office worker
- official document
- Official Journal
- official language
- official market
- official seal
- official statistics
- official visit
- offshore drilling
- offshore oil
- offshore structure
- offshoring
- oil crop
- oil industry
- oil mill
- oil pipeline
- oil pollution
- oil refining
- oil seed rape
- oil technology
- oilfield
- older worker
- oleaginous plant
- oligarchy
- oligopoly
- oligopsony
- olive
- olive oil
- olive-growing
- Olomouc
- Olt
- Olympic games
- Oman
- on line data service
- one person household
- one-parent family
- one-party system
- only child
- OPEC
- OPEC countries
- open ballot
- open market
- open method of coordination
- open university
- operating cost
- operating result
- operating system
- operation of the Institutions
- operational expenditure
- operational programme
- opinion
- opinion of the Court of Auditors
- opinion of the EC Court of Justice
- opinion poll
- Opole province
- opposition
- opt-out clause
- optical character recognition
- optical industry
- optical medium
- optics
- oral question
- orchard
- ordinance
- ordinary court of law
- ore deposit
- ore processing
- organ transplant
- organic acid
- organic chemical
- organic farming
- organic fertiliser
- organic law
- organic pollution
- organic product
- organisation
- organisation chart
- Organisation for the Prohibition of Chemical Weapons
- Organisation of American States
- Organisation of Arab Petroleum Exporting Countries
- organisation of elections
- organisation of health care
- organisation of production
- organisation of professions
- organisation of research
- organisation of teaching
- organisation of transport
- organisation of work
- organisational culture
- organised crime
- originating product
- orphan
- Orthodoxy
- OSCE
- Oulu
- outflow of capital
- outline law
- outplacement
- outsourcing
- outward processing
- over-exploitation of resources
- over-production
- over-the-counter drug
- overheads
- Overijssel
- overlapping of income
- overpopulation
- overseas countries and territories
- overseas department (France)
- overseas territory
- overtime
- own consumption
- own resources
- own-account transport
- owner farming
- ownership
- oxide
- oxygen
- ozone
