FAQ in Grammar - Acronyms and Initialisms?
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Generally, use periods for lowercase initialisms (a.k.a., e.d.p., p.m.) but not for uppercase ones (GDP, IRA, UFO). Exceptions include geographic names (U.S., U.K., E.U.) and formal expressions of academic degrees (B.A., M.B.A., Ph.D.).
Form the plural of an acronym or initialism by adding a lowercase s. Do not use an apostrophe (CARs, DVDs).
Do not follow an abbreviation with a word that repeats the final term in the abbreviation (ATM location not ATM machine location)" (Alred, Brusaw, and Oliu). |
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