Come for Learn: Important Abbreviations: Abbreviations are extremely important to learn. You need to use abbreviations in your daily communication models. However, it is also important to update yourself with respect to abbreviations used across the globe. Most abbreviations play a major role in booking, cancelling flight tickets, understanding and decoding codes. If you are well aware about abbreviations, half the job is complete. The most common and important abbreviations in India include: 1. R&D – Research and Development 2. PIN – Postal index number 3. PWD – Public works department 4. AASU – All Assam Students Union 5. ABM – Anti Ballistic Missile 6. ABCDE – Annual Bank Conference on Development Economics 7. ABT – Availability Based Tariff 8. AC – Alternate Current or Ashok Chakra or Air Conditioner or Antarctic Club 9. AD – Ano Domini (After the birth of Jesus) 10. ADA – Air Defence Artillery 11. AERE – Atomic Energy Research Establishment 12. AFLP – Accelerated Female Literacy 13. AFPPD – Asian Forum of Parliamentarians on Population & Development 14. AGOC – Asian Games Organization Committee 15. AICC – All India Congress Committee 16. AICCTU – All India Central Council of Trade Unions 17. AICI – Agricultural Insurance Corporation of India 18. AIDS – Acquired Immune Deficiency Syndrome 19. AIFF – All India Football Federation 20. AIL – Aeronautics India Limited 21. AIMPLB – All India Muslim Personal Law Board 22. AINEC – All India Newspapers Editors Conference 23. AIR – All India Radio 24. ALH – Advanced Light Helicopter 25. AM – Anti Meridian (Before Noon) 26. AMIE – Associate Member of the Institute of Engineers 27. ANC – African National Congress 28. APNN – Asian Pacific News Network 29. APEC – Asian Pacific Economic Cooperation 30. APPLE – Asian Passenger Payload Experiment 31. APPU – Asian Pacific Postal Union 32. ARF – Asian Regional Forum 33. ARDS – Acute Respiratory Distress Syndrome 34. ASEAN – Association of South East Asian Nations 35. ASLV – Augmented Satellite Launch Vehicle 36. ASI – Archaeological Survey of India 37. ASSOCHAM – Associated Chamber of Commerce and Industry (India) 38. AWACS – Airborne Warning and Control System 39. ATCI – Air Time Committee of India 40. ATPLO – All Tripura Peoples Liberation Organization 41. ATS – Anti Tetanus Serum 42. ATTF – All Tripura Tribal Force 43. BARC – Bhabha Atomic Research Centre 44. BBC – British Broadcasting Corporation 45. BC