It's not really set in stone, from here[0], for instance - "Technically, since "mouse" is an acronym for "manually-operated user-select equipment," it could pro

It's not really set in stone, from here[0], for instance - "Technically, since "mouse" is an acronym for "manually-operated user-select equipment," it could probably be pluralized as "mouses." But since hardly anyone is aware of the word's etymology, and because it sounds less awkward, most people pluralize it as "mice."" [0] - http://painintheenglish.com/case/534 http://painintheenglish.com/case/534