National and Non-Govt. abbreviations for N.

N.I.P.A. -National Institute of Public Administration.
N.R.U.C. -Natural Resources Utilisation Committee.
N.E.A.C. -National Education Advisory Council.
N.I.E.O. -New International Economic Co -operation.
N.C.M.C. -National Committee for Medical Education.
N.M.C.I. -National Mass Communication Institute.
N.C.R.C.B. -Non-Locals Central Repatriation Committee of Bangladesh.
N.A.A.F.I. -Naval,Army and Air Force Institutes.
N.I.C.A.R. -National Implementation Committee for Administrative Reorgansation.
N.I.T.U.A. -National Independent Troop's Union of Anola.
N.A.T.A.B. -National And Tuberculosis Association of Bangladesh.     
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National Abbreviations for N

N.O.C. -National Olympic Committee,
N.O.C. -No Objection Certificate.
N.S.C. -National Savings Certificate.
N.B.C. -National Book Centre.
N.F.P. National Focal Point.
N.H.L. -National Hockey League.
N.R.R. -Net Reproduction Rate.
N.R.A. -National Recreation Association.
N.L.F. -National Liberation Front
N.B.R. -National Board of Revenue.
N.S.F. -National Shooting Federation.
N.D.P. -National Development Programme.
N.G.O. -Non Government Organisation.
N.B.C. -National Broadcasting Corporation.
N.T.C. -National Tele-communication Commission.
N.W.D. -Nation Wide Dialling.
N.U.M.W.-National Union of Mine Workers

Important national Abbreviations start N.

N.I.M.C. -National Institute of Mass Communication.
N.L.F.A. -National Liberation Fronts of Angola.
N.A.T.O. -North Atlantic Treaty Organisation.
N.S.C.B. -National Sports Control Board.
N.F.P.B. -National Family Planning Board.
N.C.C.B. -National Council of Churches of Bangladesh.
N.A.S.S. -National Association of Social Science.
N.C.N.A. -New China News Agency
N.C.S.T. -National Council for Science and Technology.
N.A.S.A. -National Aeronautics and Space Administration.

Save our soul and others abbreviations running S.

S.A.F. -South Asian Federation.
S.A.S. Soandinavian Airlines System.
S.A.C. -Strategic Air Command.
S.B.C. -Sadharan Bima Corporation.
S.C.F. -Save the Children Fund.
S.C.I. -Service Civil International.
S.D.I. -Strategic Defence Initiative
S.F.F. -Supplementary financing Facility.
S.H.P. -Selp-Help Project.
S.I.D. -Society for International Development.
S.K.S. -Sena Kalyan Sangstha.
S.O.S. -Save our soul.
S.S.M. -Surface to Surface Missiles.
S.T.D. -Subscriber's Trunk Dialling.

R and Q abbreviations.

Q.M.G. -Quarter Master General
Q.M.G.O. -Quarter Master General of Ordnance. 
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R.A.F. -Royal Air Force.
R.A.S. Royal Asiatic Society.
R.B.I. -Reserve Bank of India.
R.M.A. -Royal Military Academy.
R.D.B. -Rajshahi Development Board.
R.D.C. -Rural Development Council.
R & H.-Roads and Highways.
R.C.D. -Regional Co-operation for Development.
R.P.M. -Revolution Per Minute.
R.H.C. -Rural Health Complex.
R.E.A. -Rural Electrification Administration.
R.E.B. -Rural Electrification Board
R.T.G. -Research Task Groups.
R.H.D. -Roads and Highways Department.
R.M.S. -Railway Mail Service.
R.S.S. -Rural Social Service.
R.A.F.O. -Reserve of Air Force Officers. 
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Multi Abbreviations for M

M.N.T. -Multi National Trade.
M.D.F. -Main Distribution Frame
M.D.S. -Master of Dental Surgery
M.F.A.-Multi Fibre Agreement.
M.T.N. -Multilateral Trade Negotiations.
M.A.D. -Multi Assured Destruction
M.I.S. -Management Information System.
M.N.L.F. -Moro National Liberation Front.
M.P.L.A. -People's Liberation Movement of Angola.
M.B.B.S.-Bachelor of Medicine and Bachelor of Surgery.
M.R.C.P. -Member of the Royal College of Physicians.

Master abbreviations for M.

M.C.C. -Marylebone Cricket Club
M.G.O. -Master General of Ordnance.
M.F.N. -Most Favoured Nation.
M.C.H. -Maternity Health Centre
M.V.A. -Mega Volt Ampere.
M.G.C. -Machine Gun Corps.
M.V.R. -Motor Vehicles Rules.
M.Y.O. -Muslim Youth Organisation.
M.T.B. -Motor Torpedo Boat.
M.T.S. -Mobile Training Scheme.
M.E.P. -Malaria Eradication Programme.