Welcome to &TCPIUG;, the official documentation of &TCPI;. This book describes the infrastructure of &TCP;, its components and how you can contribute to make it better. If you are a system administrator interested in making &TCP; a better project, this book is definitly for you. To make the information in this book managable, it has been organized in the following parts: describes ... describes ... contains the lincense documents mentioned in this book. &preface-overview; &preface-docconvs; &preface-feedback;