"Mike Cawood, HND BIT" wrote in
:

There will also be some people who for bizarre reasons not worth
going into think that the symbol pronounced "pound" is a
noughts-and-crosses grid.

That's because the hash symbol in US keyboards is in the same place as
our pound symbol (shift 3).
Mike.

I believe the reason # is called a pound sign by Americans is that it is
sometimes used in the USA to mean pounds weight. In American usage, #3
means 'number 3' and 3# means '3 lbs'. The latter is a bit old-fashioned,
but you see it sometimes in markets and the like.

Peter

--
Peter Campbell Smith ~ London ~ pjcs00 (a) gmail.com