I think there is a hard and fast rule about this as it’s a common problem. Is there really an answer per minute? I would say that it doesn’t really matter what they use as long as there’s no possibility of confusion. I would say that whatever you decide to use would be preferred. Have patience and learn from them. Thank you. In the UK some land can be designated for its nature value. The Sites of special Scientific Interest are known variously, in both spoken

1. and written usage, as:
2. An SSSI As far as
3. I’m aware there have been no

objections, arguments or confusion about the ‘correct’ way.

I would say, if these files are normally referred to as dot avi files then go with a. If we don’t buy a file for this purpose then I want the file to be. Is that true? Is avi

an amazing tool?

If a polyphonic extension starts with a vowel or vowel sound, use ‘an”, whether you include the preceding dot or not. With

a css here, I agree the first example he gives, which (following Dnaaz’s advice as modified above) should read an.html. I also agree with LightMikeE’s reply except for the first example he gives, which should read “an.html.” “Don’t

you think it’s possible to be a man or woman?

I think it depends on the user and the context.

If you are referring to the extension itself, such as:

  Then save the file with a. html extension  

Then, since you’re referring to the “. HTML Extension “. html” to avoid coding and display an ambiguous file type. Use “a dot html” to explain the problem. In this case, you can’t call it “a html extension” since that doesn’t define what the extension actually is.

If you’re referring to the file itself, such as so: I

  should be referring to an AVI file there.  

Use the form “an AVI” here.

If you refer to files with the extension, such as Files

  should have. There 
 should be. Again, if you refer to files with the extension, such as. What are the files that can be viewed on an Avi file?  

To use the word dot, omit all the words. After that, add the word dot. Ignoring the fullstop when writing file types (not extensions) would be how I’d solve this. Truely a matter of preference, understandable either way, but slightly different.

I said “…a dot html” in my head, but then I read his first example as “an html extension”. Thought I was looking and reading but was not sure what happened. Just a couple of hours later again. My brain skipped the.. and is not even thinking. In. in. html because it didn’t see it as ending a sentence, so it somehow didn’t mentally ‘count’.

So follow normal rules with extensions if you start with a vowel and you spell ‘an’, regardless of the preceding dot or not. But

I’d say its not useful for an extension right now.