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Do you use “a” or “an” before acronyms?

Although I am clear about the usage of 'an' and 'a' on most cases, but I am not sure how they are applied in front abbreviations. I heard that, whether vowel or consonants, abbreviations are always used with the 'an' article.

Can someone confirm this?

marked as duplicate by b.roth, Kosmonaut Sep 8 '10 at 11:05

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  • If you are using a TLA that starts with a consonant sound, you should use 'a'. If the ABR begins with a vowel, it's an ABR. This does lead to some small difficulty in your case because it depends on how it is habitually pronounced. If you spell it out, it should be an S-Q-A. But if you call it a SKWA, then it would be a SKWA. Sometimes both possibilities exist: an SQL script, or a SQL script, depending on whether you say ess-kew-ell, sequel or squeal. I've no idea what to do then. – Brian Hooper Sep 8 '10 at 8:48