Completar frases Abbreviations & acronyms.Versión en línea Read the article. Which of the abbreviations do you recognize? por MaNuel Btz 1 language nouns letters abbreviations terms vary conversation flying which UNESCO What's a UFO ? It's an unidentified object , of course ! There are many organizations , expressions , scientific and common expressions that are represented by their initial . These become 'words' and function as . Some of them are international , such as and FIFA , but others such as AIDS from language to . These are many text message which are now common in everyday , such as LOL means laugh out loud .