just as Royal Bank of Canada used its full name in Canada (a constitutional monarchy but its now-defunct.S. In addition, this feature enables readers possessing knowledge of the abbreviations not to have to encounter expansions (redundant for such readers). Citation needed For example, "the onset of Congestive Heart Failure (CHF or "the onset of congestive heart failure (CHF if found in an unpublished manuscript would be rewritten as "the onset of congestive heart failure (CHF in the final published article when following the AMA. The widespread, frequent use of acronyms across the whole range of registers is a relatively new linguistic phenomenon in most languages, becoming increasingly evident since the mid-20th century. Merriam-Webster's Dictionary of English Usage, 1994. Webster's New Universal Unabridged Dictionary (2003 Barnes Noble.