Abbreviations - Guide to Grammar
guidetogrammar.org › grammar › abbreviationsAbbreviate the following: Titles before names: Mrs., Mr., Ms., Prof., Dr., Gen., Rep., Sen., St. (for Saint) Notice that Miss is not an abbreviation, so we don't put a period after it. Ms. is not an abbreviation, either, but we do use a period after it — probably to keep it consistent with Mr. and Mrs. The plural of Mr. is Messrs.