Possible Duplicate: Do you use “a” or “an” before acronyms? What article should be used directly in front of an acronym that begins with 'N?' Since the pronunciation ...
Possible Duplicate: Do you use "a" or "an" before acronyms? When there is an acronym such as NSFW (Not Safe For Work) as in the following example This is an NSFW link ...
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," ...