【正确答案】：
ACRONYMY IS THE PROCESS OF FORMING NEW WORDS BY JOINING THE INITIAL LETTERS OF NAMES OF SOCIAL AND POLITICAL ORGANIZATIONS OR SPECIAL NOUN PHRASES AND TECHNICAL TERMS. WORD FORMED IN THIS WAY ARE CALLED INITIALISMS OR ACRONYMS, DEPENDING ON THE PRONUNCIATION OF THE WORDS. INITIALISMS ARE WORDS PRONOUNCED LETTER BY LETTER, SUCH AS VOA, BBC, TV. ACRONYMS ARE PRONOUNCED AS A NORMAL WORD, FOR EXAMPLE, AIDS (ACQUIRED IMMUNE DEFICIENCY SYNDROME), TEFL (TEACHING ENGLISH AS A FOREIGN LANGUAGE). N-BOMB (NUCLEAR BOMB), G-MAN (GOVERNMENT MAN), ETC.
【题目解析】：首字母组合词是通过加入社会和政治组织名称的首字母或特殊名词短语和技术专有名词来形成新词的过程。以这种方式形成的单词被称为首字母组合词或首字母缩略词，这取决于它们的发音。按字母发音的首字母缩略词是一个字母接着一个字母发音的单词，如美国之音、英国广播公司、电视。按词发音的首字母组合词是一个常规的词，例如艾滋病(获得性免疫缺陷综合症)，TEFL(英语作为外语教学)。N-bomb(核弹)，G-man(政府人员)等。