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OCA
Offshore Contractors Association
OECD
Organisation for Economic Cooperation & Development
Oil field
A geographic area under which an oil reservoir lies
OLF
Oljeindustriens Landsforening (Norwegian equivalent of OPITO)
OPEC
Organisation of Petroleum Exporting Countries
OPITO
Part of Cogent – Responsible for Offshore Sector (used to be Offshore Petroleum Industry Training Organisation)