OECD :
ORGANISATION OF ECONOMIC CO-OPERATION AND DEVELOPMENT
OIL : OIL
INDIA LIMITED
ONGC : OIL
AND NATURAL GAS COMMISSION
OPEC : ORGANISATION
OF PETROLEUM EXPORTING COUNTRIES
ORV : OCEANOGRAPHY
RESEARCH VEHICLE
OCR : OPTICAL
CHARACTER RECOGNITION
OHP : OVER
HEAD PROJECTOR
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