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Chapter 29. A Capital Affair > Short and Sweet: Abbreviations - Pg. 339

A Capital Affair 339 4. Examples: A.M. or a.m.; P.M. or p.m. Abbreviate some historical periods. In some cases, the abbreviation is placed after the date; in other cases, it comes before it. Examples: B.C. (before the birth of Christ) and B.C.E. (before the common era) always follow the number, as in 409 B.C. (or B.C.E. ) Word Watch A.M. stands for before noon; ante meridian. P.M. stands for afternoon; post meridian. 5. (common era) comes after the number; A.D. ( Anno Domini ) may come before or after it, as in A.D. 14 (or C.E. ). If the century is spelled out, A.D. must come after it, as in the sixth century A.D. Abbreviate geographical terms. Examples: Their new house is on the corner of Main St. and Pine Tree Ave., near Lois La. C.E. The following chart lists some of the most common abbreviations for geographical terms. If there's the slightest chance of a misdelivery or misunderstanding, write out the full place name.