This exercise began to understand the game of baseball. Hugh Dubberly describes this series of work as a step-by-step approach to introducing information architecture. The aim of this exercise is to understand a body of content in preparation for designing systems. The work reflects on a whole range of information design problems; yet it is focused on the structure.

Baseball is a system: it consists of elements and their relationships. Since the entire system cannot be held in the mind at once, it is complex.