Hello Valtino, We call them "acronyms" (set of initials)... eg : UNO (United Nations Organization ) MSF (Médecins sans Frontières) NSF (National Science Foundation) TGV ( Train à Grande Vitesse) NYC (New York City) OPEC (Organization of Petroleum Exporting Countries) .../...

AIDS: acquired immune deficiency syndrome INTERPOL: International Criminal Police Organization CD-ROM: Compact Disc read-only memory USA: United States of America =) ciao

AANZFTA ASEAN Australia New Zealand Free Trade Agreement µ AAT Administrative Appeals Tribunal ABARE Australian Bureau of Agriculture Resources and Energy ABC Activity Based Costing ABN Australian Business Number ABR Australian Business Register ACA Australian Consumers’ Association ACAG Anti Counterfeiting Action Group ACC Australian Copyright Council ACCC Australian Competition and Consumer Commission ACE Advisory Committee on Enforcement µ ACIAR Australian Centre for International Agricultural Research ACIP Advisory Council on Intellectual Property ACIPA Australian Centre for IP Agriculture ACRA Australian Cultivatar Registration Authority ACS Australian Customs Service ACTA Anti-Counterfeiting Trade Agreement µ ADA Australian Digital Alliance

Hello Valtino , Check some of the universally used abbreviations here : http://www.history.com/encyclopedia.do?articleId=200035

- CAE (Certificate in advanced English) - CPE (Certificate of proficiency in English) - TOEFL (Test of English as a foreign language) - TOEIC (Test of English for international communication) - IELTS (International English language testing system) - ECCE (Examination for the Certificate of Competency in English) - ECPE (Examination for the Certificate of Proficiency in English) - ESOL (English for speakers of other languages)