Period sentence for class 1

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    Period

    Abbreviations

    In addition to ending a sentence, the period is used with certain abbreviations. The current style is to use periods with most lowercase and mixed-case abbreviations (examples: a.m., etc., vol., Inc., Jr., Mrs., Tex.) and to omit periods with most uppercase abbreviations (examples: FBI, IRS, ATM, NATO, NBC, TX).

    Note, however, that many scientific and technical abbreviations are formed without periods, even when they are lowercase or mixed-case.

    Examples: kHz (kilohertz), rpm (revolutions per minute), kg (kilogram), Na (sodium), 1st (first).

    And a few uppercase abbreviations, including academic degrees, retain periods.

    Period at the end of sentence meaning

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  • When not to use a period

    • Examples: U.S. (United States), J.D. (Juris Doctor), D.D.S. (Doctor of Dental Surgery). Some authorities, including The Chicago Manual of Style, favor omitting the periods in the previous examples.

    Most established abbreviations can be found in a good dictionary, which will inform you of the use or nonuse of periods.

    See also the entry on style. Whether you choose to use periods or not, consistency is vital. It is inexcusable to w

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