Some abbreviations

UNESCO-United Nations Educational, Scientific and Cultural Organization
NASA-National Aeronautics and Space Administration
LASER-Light Amplification Stimulation Emission Radiation
the BBC-the British Broadcasting Corporation
P.O. -Post Office
W.H.O. -World Health Organization
U.N. -United Nations
U.F.O. -Unidentified Flying Object
E.S.L. -English as a second language
G.O.P. -Grand Old Party (the Republican party in the US politics)
L.A. -Los Angeles
CIA-Central Intelligence Administration