Acronyms and initialisms ending in “s” and possession
Writing for Business Quiz
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Which is correct? _____ compatibility with earlier technologies is one advantage. a. SAS’s b. SAS’ |
Answer: a or b, depending on the standard you follow
Explanation: In general, treat acronyms and initialisms as if they were words. Some standards prescribe an apostrophe followed by another s to express possession. However, AP style is to omit the second s and just put an apostrophe at the end of the word.
Grammar Girl addresses the issue here.