The Guide - Because Knowledge Grows On Trees. The Guide evolved from the need
to have an application that could organize information and ideas in a
hierarchical, tree-like structure. Tree-based structures are frequently
employed to manage information through a "divide-and-conquer" approach,
wherein each level of the tree represents a further level of specialization
of the parent-level topic — the best example of this being a book. (in
Business and Productivity)