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.