Which one of the following is correct?

  1. only in the continental U.S.A. For all other countries...

  2. only in the continental U.S.A.. For all other countries...

I am not sure if I need two periods after "U.S.A." or just the one.


2 Answers 2


The general consensus seems to be that there is never an acceptable use of two sequential periods. A period at the end of an abbreviation is adequate punctuation when a period would end the sentence naturally. If any punctuation mark other than a period is needed, that may be added. Similarly, within a sentence, as when a comma would be appropriate, that may be added.

  • Thanks John ! That's what I thought, but wanted to make sure !!
    – xsimix
    Aug 27, 2013 at 21:33

III. only in the continental USA. For all other countries...

avoids the awkward lack of consistency of (1) and the awkward style of (2) - and is correct

(The United States of America (USA or U.S.A.)... : http://en.wikipedia.org/wiki/United_States

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