I don't personally agree with this convention, but apparently some people do: "A growing convention, which I first came across in Robert Bringhurst’s The Eleme

I don't personally agree with this convention, but apparently some people do: "A growing convention, which I first came across in Robert Bringhurst’s The Elements of Typographic Style, dictates that if an acronym is pronounced as a word, then it should not be written in all caps. (As opposed to initialisms, which are pronounced as a series of letters. Compare Nato to USA.)" http://scratchtap.com/when-acronyms-should-not-be-capitalized/ http://scratchtap.com/when-acronyms-should-not-be-capitalize...