"Pozidriv" [was Re: Tools (was: IBM 5155 analogue display fault]

[der Mouse]

> I have a minimal tookit (flat blade, Phillips, Pozidriv, Torx, Allen
> keys) upstairs, [...]

Which reminds me - I've seen this "Pozidriv" screw drive mentioned
elsewhere in this thread, as if it were a common type.  Since there is
no screw drive type I know by that name, this leads me to wonder, what
is it?  (It may be another name for one I know, or it may be one I
don't know but which is common in circles I've never moved in, or
perhaps I misread the references and it's not actually that common.)

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