On Dec 28, 9:21*am, The Other Mike
wrote:
On Tue, 27 Dec 2011 19:34:45 -0800 (PST), thirty-six

wrote:
On Dec 28, 1:51*am, "Rick Hughes"
wrote:

As to why we won;t go all Pozi ... simple, US uses choses not to use Pozi.

GKN have the rights to it.

...in the UK and possibly in some bits of the old empire.

Have a look who invented Posidriv and in what country, *the answer
surprises many. It wasn't GKN, nor in the UK.

--

Bit on the topic here.
http://en.wikipedia.org/wiki/Screw_head
There's a few I've never seen.