Understanding the intricacies of English grammar often requires examining the exceptions and edge cases that defy standard rules, and the topic of acronym ending in s plural is a prime example. When an abbreviation, initialism, or acronym concludes with the letter s, determining the correct way to form its plural can create confusion for writers and speakers alike. Should you add an apostrophe, an s, or both? The answer lies in understanding the established style guidelines and the specific context in which the term is used.
The Standard Rule for Acronyms Ending in S
For the majority of acronyms and initialisms that end with the letter s, the standard grammatical rule applies: simply add an apostrophe to indicate possession or to form the plural. This approach treats the acronym as a singular noun ending in s, similar to how you would handle the word "bus" or "glass." The primary goal is to maintain readability and prevent the visual clutter that can occur when multiple letters are stacked.
Possessive Forms
When indicating possession for an acronym ending in s, the style is generally consistent across professional writing. You add only an apostrophe after the final s, rather than adding an additional s. This keeps the text clean and avoids the awkward doubling of the s sound. For instance, if you are referring to the headquarters belonging to the CIA, the correct form is "the CIA's director," not "the CIAs' director." This rule ensures that the written language remains smooth and professional, particularly in formal documentation.
Plural Forms
Forming the plural of an acronym that ends in s is equally straightforward. You simply add an apostrophe after the existing s to create the plural version. This method signals to the reader that the term refers to multiple instances of the organization or concept without adding unnecessary letters. For example, when discussing multiple instances of the Bachelor of Science degree, the correct notation is "B.S. degrees," where the apostrophe clarifies that there is more than one B.S. This convention is widely accepted in academic and technical writing.
Exceptions and Style Guide Variations
While the apostrophe rule is the dominant standard, some style guides and specific organizations advocate for a more modern approach that omits the apostrophe entirely for plurals. In this alternative method, an s is simply appended to the end of the acronym without any punctuation. For acronyms ending in s, this results in doubling the s, such as "UFOs" or "SOSs." This style is often favored for its clean appearance and is common in journalistic and general business writing.
