"a" or "an" before a vowel sound file extension

[Dennis DeSantis]

Hi folks,

I'm wondering which of these is correct:

"[...] with a .aaa file extension"

or

"[...] with an .aaa file extension"

The question really is about how the extension is read.  Is the dot read 
in your head as the word "dot," or is it just glossed over/implied?

Thanks,

-- 
Dennis DeSantis
www.dennisdesantis.com


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