The one I came up with used both hands. Each finger on one hand has 9 points - three on the left side, three on the middle surface, and three on the right - whi

The one I came up with used both hands. Each finger on one hand has 9 points - three on the left side, three on the middle surface, and three on the right - which were the values 1-9. The fingers of the other hand indicate the point, by touching the point. If the value is 0 then there's no touch. This could encode the values 0-99,999.