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The apostrophe was used for plurals from the 17th to the 19th century. Even today the practice of marking the plural with the apostrophe is standard in these areas (from the Oxford Companion to the English Language):
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(1) with abbreviations such as V.I.P.'s or VIP's, although such forms as VIPs are now widespread. (2) With letters of the alphabet, as in His i's are just like his a's and Dot your i's and cross your t's. In the phrase do's and don'ts, the apostrophe of plurality occurs in the first word but not the second, which has the apostrophe of omission: by and large, the use of two apostrophes close together (as in don't's) is avoided. (3) In decade dates, such as the 1980's, although such apostrophe-free forms as the 1980s are widespread, as are such truncations as the '80s, the form the '80's being unlikely. (4) In family names, especially if they end in -s, as in keeping up with the Jones's, as opposed to the Joneses, a form that is also common.
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So there is some variation in acceptable apostrophe use. |
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