When something belongs to multiple items or acronyms (plural), you add an apostrophe to the plural word of the acronym. For example: There are five UFOs over there. The UFOs' lights are different colours.

Can you pluralize an acronym?

The plural of an abbreviation or acronym is usually formed by adding "s" to the end. For example: MOT > MOTs. ATM > ATMs.

Do you capitalize words when defining an acronym?

Typically, acronyms and initialisms are written in all capital letters to distinguish them from ordinary words. (When fully spelled out, the words in acronyms and initialisms do not need to be capitalized unless they entail a proper noun.) An acronym is pronounced as a single word, rather than as a series of letters.