Ok, this was brought up on a VW/Audi forum, and as petty as it seems I got a friend in Jersey who thinks otherwise, and says that englishforums.com agrees with him.
The word brought up was RC car, as in remote controlled car. I said "it looks like an RC car" to which he replied I should be using a to precede the acronym RC.
I find that to be wrong. Why? B/c when you read the letters RC, you say it in your head, or if you're reading aloud it's spoken AR SEE. Therefore since the letter R has a vowel sound to begin it's pronunciation it needs the word "an" before it, not "a."
Same goes for letters a, e, f, h, i, l, m, n, o, r, s, x. Say to a coworker I bought a XBox 360. No, you say I bought an XBox 360.
Am I right or am I right?