Many abbreviations have a period at the end, for instance, “Feb.” and “etc.” Sentences also can have a period at the end. So what do you do when an abbreviation occurs at the end of a sentence?
I edit many papers after they’ve been rejected or sent back to the authors for major revisions. Often, I see the peer-review comments as well, and I see many mistakes come up again and again.
I don't believe that there is one correct way of speaking and that those who don't use it are uneducated and/or stupid. Language is a fantastically complex human activity. One formal style is not flexible enough for the full range of human communication needs. However, academic writing for conferences or journals is a special case.
The basic rule for articles in English is that you use “a” for words that begin with consonants and “an” for words that begin with vowels. However, if you are talking about abbreviations, especially in science papers, this basic rule doesn’t work.
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