Not to skew things any further, but I think it's important that the context in which it has been applied is relevant. " And then 2 paras later: "Mac OS X will not be available on any old x86 PC, though, as Apple wants to retain control over its hardware platform" The discussion centres around the omission of an apostrophe where there ought to be one, in an uncommon abbreviation which could mean several things, at the same time as making the 'whole' word plural by adding an 's' while dropping the apostrophe. The rules appear to be in conflict?
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My goodness, who is correcting your email?
Actually, it's the person (anon) who posted just after my original post (hence they were able to quote my original email). :-)
We're both members of a mailing list largely made up of argumentative pedantic sods (myself included) who regularly berate each other about their use of the English language.