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Write the Right Word: a.m. or AM

AM and a.m. can’t be used interchangeably.

If you are referring to time, the correct one is a.m. “The field tour will start at 10 a.m.” Always lowercase the letters and use periods.

The same rule applies to p.m. “The storm started about 3:30 p.m.”

AM is short for the amplitude modulation system of radio transmission. “The only radio station in town is an AM station.”

PM mainly is used in countries such as England and Canada; it stands for prime minister.

Ellen Crawford, (701) 231-5391

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