(the 's were fixed. I type faster then I think.)
Nothing to fix if you're old -- I have at least one if not three writing style guides around here which show that in formal papers the plural of an acronym used "'s" back in the day.
But with more and more things like Compact Disc becoming "CD" in formal writing, typing C.D.'s or later CD's went out of vogue with the formal writing crowd and now they appear to pluralize via capitalization only.
Of course, almost no one types R.A.D.A.R. anymore, either.
Language mutates.
But " 's " was once the accurate, formal, way to pluralize an acronym.
(Just like that Oxford comma I just snuck into that sentence. Also no longer correct per the Associated Press style guide and others, and more controversial. "Let's eat, grandma!" vs "Let's eat grandma!"
)