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It's funny how everyone on the planet understands how to use the word "revision", except tech nerds. When a new book comes out, no one ever refers to it as the "first revision". The second, "revised" edition is what gets that term. Just like writing a paper: 1. First Draft, 2. First revision, 2nd revision, etc.

I also avoid buying the FIRST VERSION of a new Mac model, and instead wait for the first revision.

Computer people start counting at 0. And obviously there can’t be a 0th version. So the first version must be the first revision. Or something.
 
So then, my 1st kid is really my 2nd?

Yes. Well, kid #1 is your 2nd kid, which makes your first kid 0, which is not meant as an insult, it’s just that’s how we do things. Except in PowerPC, in which case kid 0 is your 64th kid, or your 32nd kid, depending on your word size, which is a good reason not to do things the way IBM did.
 
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