This is the first volume in a series about creating and maintaining taxonomies and their practical applications, especially in search functions. In Book 1 (The Taxobook: History, Theories, and Concepts of Knowledge Organization), the author introduces the very foundations of classification, starting with the ancient Greek philosophers Plato and Aristotle, as well as Theophrastus and the Roman Pliny the Elder. They were first in a line of distinguished thinkers and philosophers to ponder the organization of the world around them and attempt to apply a structure or framework to that world. The author continues by discussing the works and theories of several other philosophers from Medieval and Renaissance times, including Saints Aquinas and Augustine, William of Occam, Andrea Cesalpino, Carl Linnaeus, and Ren Descartes. In the 17th, 18th, and 19th centuries, John Locke, Immanuel Kant, James Frederick Ferrier, Charles Ammi Cutter, and Melvil Dewey contributed greatly to the theories of classification systems and knowledge organization. Cutter and Dewey, especially, created systems that are still in use today. Chapter 8 covers the contributions of Shiyali Ramamrita Ranganathan, who is considered by many to be the father of modern library science. He created the concept of faceted vocabularies, which are widely usedeven if they are not well understoodon many e-commerce websites. Following the discussions and historical review, the author has included a glossary that covers all three books of this series so that it can be referenced as you work your way through the second and third volumes. The author believes that it is important to understand the history of knowledge organization and the differing viewpoints of various philosopherseven if that understanding is only that the differing viewpoints simply exist. Knowing the differing viewpoints will help answer the fundamental questions: Why do we want to build taxonomies? How do we build them to serve multiple pointsof view? Table of Contents: List of Figures / Preface / Acknowledgments / Origins of Knowledge Organization Theory: Early Philosophy of Knowledge / Saints and Traits: Realism and Nominalism / Arranging the glowers and the Birds, and the Insects, and Everything Else: Early Naturalists and Taxonomies / The Age of Enlightenment Impacts Knowledge Theory / 18th-Century Developments: Knowledge Theory Coming to the Foreground / High Resolution: Classification Sharpens in the 19th and 20th Centuries / Outlining the World and Its Parts / Facets: An Indian Mathematician and Childrens Toys at Selfridges / Points of Knowledge / Glossary / End Notes / Author Biography.