Why are Super-class and Sub-class reversed?

Question

In set theory, a set is a superset if it contains everything in the original set and possibly more. A subset however is does not contain everything of the initial set.

W

Answer 1

Probably for the same reason that stacks grow down (bottom at the top), trees grow down (root at the top) and 2D graphics systems are almost always quadrant IV (0,0 in upper left).