Pluralize a single letter

To form the plural of a single letter, italicize the letter and add an apostrophe followed by the unitalicized letter s .

Recommended : We called tech support because the printer wasn't printing uppercase B 's or lowercase p 's.

Recommended : If you still use a pen and paper, dotting your i 's is still necessary. Cross your t 's, too.

When the capitalization is irrelevant, use uppercase.

Recommended : Mind your P 's and Q 's.

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