In correspondence or in any circumstance that demands the saving of time or space, we abbreviate the names of states and territories, as follows:

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:

Say rather:

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: