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- DRDO – Defence Research And Development Organisation
- DTH – Direct To Home (Broadcasting)
- GST – Goods And Service Tax
- GPS – Global Positioning System
- GPRS- General Packet Radio System
- GOC – General Officer Commanding
- GNP – Gross National Products
- GNSS – Global Navigation Satellite System
- GMT – Greenwich Mean Time
- GPO – General Post Office
- GSTP – Global System Of Trade Preferences
- GSLV – Geosynchronous Satellite Launch Vehicle
- CITU – Centre Of Indian Trade Unions
- CPI – Communist Party Of India
- CPIM – Communist Party Of India (Marxists)
- ABM- Anti Ballistic Missiles
- ACU – Asian Currency Union
- ADB – Asian Development Bank
- ADS – Air Defence Ship
- DST – Daylight Saving Time
- DPI – Director Of Public Instruction
- DOD – Department Of Ocean Development
- DIN – Director Of Information Number
- DRAM – Dynamic Random Access Memory
- ECG – Electro Cardio-gram
- ECS- Electronic Clearing Service
- IAF – Indian Air force
- IAS – Indian Administrative Service
- IP – Indian Police
- IPC – Indian Penal Code
- IMA – Indian Military Academy
- INA – Indian National Army
- IMO – International Maritime Organisation
- IIT – Indian Institute Of Technology
- ISRO – Indian Space Research Organisation
- IST – Indian Standard Time
- IR – Infra-red
- ISC – Inter- State Council
- IPTV – Internet Protocol Television
- IUC – Interconnect User Charge
- ISO – International Standardisation Organisation
- JWG – Joint Working Group
- LTA – Light Transport Aircraft
- LCA – Light Compact Aircraft
- BBC – British Broadcasting Corporation
- URL – Uniform Resource Locator
- STD – Subscriber Trunk Dialling
- MRF – Madras Rubber Factory
- RDX – Research Department Explosive
- PSLV – Polar Satellite Launch Vehicle
- AMW – Asian Motor Works
- BMW – Baverian Motor Works
- INTEL – Integrated Motor Works
- JPEG – Joint Photography Expert Group
- CAT – Common Admission Test
- WIPRO – Western Indian Products
- OBC – Other Backward Classes
- IDBI – Industrial Development Bank Of India
- PNB – Punjab National Bank
- MPEG – Motor Picture Experts Groups
- RADAR – Radio Detecting And Ranging
- HDFC – Housing Development Finance Corporation
- FBI – Federal Bureau Of Investigation
- VIRUS – Vital Information Resources Under Siege
- IPI – International Press Institute
- SENSEX – Sensitivity Index (of share price)
- ATM – Automated Teller Machine
- NMD – Nuclear Missile Defence
- NPR – National Population Register
- NIS – National Institute Of Sports
- NPL – National Physical Laboratory
- NIC – National Integration Council
- NRBI – National Rural Bank Of India
- NRR- National Reproduction Rate
- RDS – Radio Data Service
- RDF – Rapid Development Force
- RCC – Reinforced Concrete Cement
- RBI – Reserve Bank Of India
- RPM – Revolution Per Minute
- RRB – Regional Rural Bank
