Possible Duplicate: Do you use “a” or “an” before acronyms? I am writing about Random Variables, which I am abbreviating to RV. Should I write 'an RV' (an Arr-Vee) ...
99% of the time, I'm clear on when I should use "a" versus "an." There's one case, though, where people & references I respect disagree. Which of the following would you precede with "a" or "an," ...