Punctuation in abbreviations
People are often uncertain about whether or not to use full stops in abbreviations. Here are some guidelines:
1. In both British and American English, if you are using initial (i.e. first) letters to represent words, you don’t normally need to put a full stop after them:
2. In American English, however, it is common to use a full stop as an alternative style for certain abbreviations, in particular:
USA or U.S.A.
US or U.S.
3. If an abbreviation consists of the first and last letters of a word, you don’t need to use a full stop at the end:
4. If the abbreviation consists only of the first part of a word, then you should put a full stop at the end:
Wed. [= Wednesday]
Dec. [= December]
See more information about abbreviations.
Back to punctuation.
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