On Thu, 9 Oct 1997, John Payson wrote:
>
> > Why would there be two carrys?  Maybe the left thumb is
> > the borrow, and the right thumb is the carry.
>
> The right thumb is the half-carry bit.  Though if there's no use for base 10
> I suppose half-carry isn't all that useful...
>
> Actually, I personally usually use my hands to count to 100: the ten digits
> have values:
>   10 10 10 10   50       5    1  1  1  1
>

 Why stop there? Goto 1024.

   512 256 128 64  32    16  8 4 2 1

 hummm, where have I seen that before.