O

OBQ	On Board Quality
OCA	Olympic Council of Asia
OCHA	Office for the Coordination of Humanitarian Affaris
ODC	Over Dimensional Consignment
ODL	Open Distance Learning
OECD	Organisation for Economic Cooperation and Development
OEM	Original Equipment Manufacturers
OES	Original Equipment Service Providers
OISD	Oil Industry Safety Directorate
OLTC	On Load Tap Changer
OMC	Oil Marketing Companies
OMC	Obulapuram Mining Company
OMDC	Orissa Minerals Development  Company
OMO	Open Market Operations
OMR	Opening Meter Reading
ONGC	Oil and Natural Gas Corporation
OPAL	ONGC Petro Additions Limited
OPEC	Oil Producing and Exporting Countries
OPEC	Organisation of Petroleum Exporting Countries
OPV	Offshore Patrol Vessel
ORAP	Operational Reliability Analysis Program
ORI	Operational Readiness Inspection
ORP	Oxidation Reduction Potential
ORS	Outage Reporting System
OSRD	Over, Short, Reject & Damage
OTC	Offshore Technology Conference
OTM	Oxygen Transport Membranes
OTP	One Time Password
OVL	ONGC Videsh Limited