According to Christopher Tidy :
Ah, there's been a slight misunderstanding here! The foam is on the
bottom of my aluminium mouse pad. It's one of those which has a
graticule engraved on the surface.

And -- the older styles of these, if the pad is rotated 90
degrees, will make the mouse appear to be broken. it will work in one
axis, but not in the other. (People who knew this used to use it to
"reserve" a workstation in a college computer lab. :-)

This works with the older mice with two "holes". The newer
ones, with only a single hole require a different mousepad, and there is
a Sun logo in one corner of these.

Enjoy,
DoN.

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