What is the plural of an acronym?

Related questions

1. What is the rule for items in a series?
2. Does Chicago style use Oxford comma?
3. Does MLA use Oxford comma?
4. Do you use an Oxford comma with an ampersand?
5. What is the comma rule?
6. Do you put a comma at the end of a list?
7. Why is the Oxford comma called the Oxford comma?
8. Does APA use Oxford comma?
9. What is a comma splice error?
10. Does the New York Times use the Oxford comma?

Tags

1. #write
2. #legitimate
3. #apostrophe
4. #indicating
5. #apostrophes
6. #object
7. #violates
8. #acronyms
9. #unusual
10. #perfectly
11. #before
12. #since
13. #modern
14. #pattern
15. #plural
16. #people