Acronyms are words formed from the initial letters of other words and pronounced as they are spelled, not as separate letters. Examples include: acronym full form Aids acquired immune deficiency syndrome NATO North Atlantic Treaty Organization UNESCO United Nations Educational, Scientific, and Cultural Organization SIM (card) subscriber identification module · Most acronyms can be written as capital letters or with only an initial capital letter. · Some acronyms are so established that they are now 'normal' words, generally used without conscious awareness of their original full form. These words should be written in lower-case letters. Examples include: laser light amplification by stimulated emission of radiation radar radio detection and ranging quango qu...