Florian Zumbiehl <florz@gmx.de> writes: > The rule I am following is that "a" vs. "an" is decided by pronounciation > only - i.e., it's "an eff ey kju", but "a FAT file system". After all, > that's how the exact letters are most easily read (without expanding > acronyms or such). Your rule is correct: it is determined by pronunciation only. But what you have missed is that many people pronounce FAQ as "fack". Thomas