The book is divided into n parts in m ways, for various n and m. --- ## Two Prefixes: Dividing Space - A "prefix" is any directory containing the typical Unix directories such as a `bin`, `lib`, `include`, `etc`, etc. - The book is primarily organized into two prefixes, as follows: 0. The Book of Roots: / 1. The Book of Users: /usr ## Three Testaments: Dividing Narratives - (-1): The lost+found directory, early history, mathematical logic to computing. - (0): Ken, Unix, C, BSD, Gnu. - (+1): Linux, the modern era. ## Two Volumes: Dividing Time - Volume N: (Negative) - Between the two volumes is when the Unix epoch (Jan 1, 1970) hits, and time resets to zero. - Volume P: (Positive)