No, just a single period. And (not having read through this thread) you needn't use one within the sentence either-- a period+comma just looks overly cluttered. Stops after such abbreviations are rapidly falling out of favour. Notice that they are

I don't see a need for the comma. I would drop the comma. That is, of course, your choice. You may want to review the references given, however, before you do.

The use of the apostrophe has nothing to do with the genitive in your example. It is common to add an apostrophe before a plural ending (s) if the s is added to an abbreviation, a numeral or anything that is not a noun. In your case this is simply

I choose this one: John H. Doe, MD

This is just a test (to see what my signature looks like)...

Found some! But who knows if they are correct... 1) http://wiki.answers.com/Q/Should_there_be_a_comma_after_the_abbreviation_Inc " Q: Should there be a comma after the abbreviation Inc? A: No. Inc. is the

Hi Becky, Keep the comma and consider whether writing out "Corporation" would be a better decision. EDIT: Oh, and welcome to English Forums!

Hi, I'd keep the comma, but drop the periods from 'p.m.', ie ... to be held today at 4 pm, followed by a Burial Service at... Clive

I am looking around for the answer to this question too! I am revising my resume. I have to abbreviate the word "corporation" inorder to match the formatting in the rest of the page. So I wanted to know: Should I use a comma after

Dear friend, for your case, it is handy to distinguish between abbreviations and contractions. The former are represented by P. and S ., while the latter are manifested by Dr and Mr. A full point is not needed for contractions but is desirable