First let me say that I am a native english speaker and any typos are due to poor editing and not a lack of education. Next let me be clear that we are talking about abbreviations that are commonly used AS ABBREVIATIONS. Let us take the FBI as a concrete example. It is quite common to refer to them as the FBI or an FBI agent. Likewise MRI. It is quite common to say MRI, not magnetic resonance imaging or whatever.
Those of us who cannot agree that this is common, please open a debate in GD.
Is it AN FBI agent or A FBI agent?
How about the rule in general? Is it an honor to meet you or a honor to meet you?
Lastly, I rarely ask for a cite, but in this case, as I am involved in discussions here at work, can you provide a cite? The person in the discussion will accept a reference from a well-respected author published before 1960. So if Dickens has said “It is an honor to meet you” anywhere in his work, that will be considered sufficient. Faulkner I’m guessing works. Pretty much any well-respected author.
I have found the following cite http://andromeda.rutgers.edu/~jlynch/Writing/a.html who says:
The person in question refuses to accept this cite and says that the rules must have changed since he was taught in the 1960s. He also says that if he had his grammar book from 1960 he could provide a cite for me, but he does not.
I asked this once before and the resultant hijack resulted in a lock down. I hope that my more carefully worded request won’t have the same results.