Idaho, Ida.
Illinois, Ill.
Indiana, Ind.
Iowa, Ia.
Kansas, Kan.
Kentucky, Ky.
Louisiana, La.
Maine, Me.
Maryland, Md.
Massachusetts, Mass.
Michigan, Mich.
Minnesota, Minn.
Mississippi, Miss.
Missouri, Mo.
Montana, Mont.
Nebraska, Neb.
Nevada, Nev.
New Hampshire, N. H.
New Jersey, N. J.
New Mexico, N. M.
New York, N. Y.
North Carolina, N. C.
North Dakota, N. D.
Ohio, O.
Oklahoma, Okla.
Oregon, Ore.
Pennsylvania, Pa. or Penna.
Rhode Island, R. I.
South Carolina, S. C.
South Dakota, S. D.
Tennessee, Tenn.
Texas, Tex.
Vermont, Vt.
Virginia, Va.
Washington, Wash.
West Virginia, W. Va.
Wisconsin, Wis.
Wyoming, Wyo.
488. Use a. m. and p. m. after dates in lists of dates or schedules of trains or for any similar purpose, but in the text of a letter or manuscript it is better to write them out in full. As for example, do not say:
I will arrive tomorrow a. m., or, You may call about eight p. m.
Say rather:
I will arrive tomorrow morning. You may call at eight o'clock this evening.
The letters a. m. are the abbreviation for ante meridiem, Latin for before noon; and p. m. for post meridiem, meaning afternoon.
489. Two consecutive years may be written 1914-15, but use 1915 rather than '15. In the heading of letters it is better to write the date out in full, as, May 28, 1915, instead of 5-28-15.
In the back of your dictionary you will find a complete list of accepted abbreviations used in writing and printing. The list that follows contains abbreviations most commonly used, especially in business correspondence:
@ for at
acct. for account
agt. for agent
amt. for amount
ans. for answer