Decimal is
just what you learned in school.
. . . and based on the very arbitrary basis of number of fingers.
You mean number of finger _plus thumbs_. If it was the number of fingers
only, we'd use octal, which IMHO is a much nicer number system.
[Base 8 is just like base 10 really, if you're missing 2 fingers -- Tom
Lehrer]
-tony