In declarative sentences, if an abbreviation that takes a final point ends the sentence, finish the sentence with just one final point/full stop.
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The new faculty service provides updates on roundtables, forums, seminars, courses, etc. |
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This research is the initiative of a number of companies, including Apple Inc. |
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The tour of the Aula Magna will end at 2.30 p.m. |
In the case of questions and exclamations, however, finish the sentence with the final point of the abbreviation followed by a question mark or exclamation mark.
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Can this department really base its future decisions on the findings of Brown et al.? |
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This was hardly the position adopted by Washington D.C.! |