• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
• N
• O
• P
• Q
• R
• S
• T
• U
• V
• W
• X
• Y
• Z

Abbreviations
OAS	Organisation of American States
OAU	Organisation of African Unity
OBC	Other Backward Communities
OBU	Offshore Banking Unit
ODA	Official Development Assistance
ODF	Open Document Format
ODS	Ozone Depletion Substances
OECD	Organisation of Economic Co-operation and Development
OGL	Open General Licence
OIC	Organisation of Islamic Countries
OIGS	On India Government Service
OIL	Oil India Limited
OK	All Correct
OM	Order of Merit
ONGC	Oil and Natural Gas Commission
OPEC	Organisation of Petroleum Exporting Countries
OSCE	Organisation for Security and Cooperation in Europe
OSD	Officer on Special Duty
OXML	Open Extended Marking Language