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{\Large

{\sc A Comprehensive Tutorial on Copyleft and GPL Licensing, Compliance, and Enforcement}} \\

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Copyright \copyright{} 2003, 2004, 2005 \hspace{.2in} Free Software Foundation, Inc.

\vspace{.3in}

The copyright holders hereby grant the freedom to copy, modify, convey,

Adapt, and/or redistribute this work under the terms of the Creative Commons

Attribution Share Alike 4.0 International License.  A copy of that license is

available at \verb=https://creativecommons.org/licenses/by-sa/4.0/legalcode=.

Each part of this book is separately this same license, but copyrighted by

different authors at different times.  Each part therefore also contains its

own copyright and licensing notice.  The notice above is for the entire work,

and includes all.

}

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\end{titlepage}

\chapter{Preface}

This tutorial is the culmination of nearly a decade of studying and writing

about software freedom licensing and the GPL\@.  Each part of this tutorial

is a course unto itself, educating the reader on a myriad of topics from the

deep details of the GPLv2 and GPLv3, common business models in the copyleft

licensing area (both the friendly and unfriendly kind), best practices for

compliance with the GPL, both for engineers and managers, as well as

real-world case studies of GPL enforcement matters.

It is unlikely that all the information herein is necessary to learn all at

once, and therefore this tutorial likely serves best as a reference book.

The material herein has been used as the basis for numerous live tutorials

and discussion groups since 2002, and the materials have been periodically

updated.   They likely stand on their own as excellent reference material.

However, if you are reading these course materials without attending a live

tutorial session, please note that this material is merely a summary of the

highlights of the various CLE and other tutorial courses based on this

material.  Please be aware that during the actual courses, class discussion

supplements this printed curriculum.  Simply reading it is not equivalent to

attending the course.

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\part{The GPL and Legal Aspects of Free Software Development}

This part is: Copyright \copyright{} 2003, 2004, 2005 \hspace{.2in} Free Software Foundation, Inc.

Authors of this Part Are: \\

Bradley M. Kuhn \\

David ``Novalis'' Turner \\

Daniel B. Ravicher \\

John Sullivan

\vspace{.3in}

The copyright holders of this part hereby grant the freedom to copy, modify,

convey, Adapt, and/or redistribute this work under the terms of the Creative

Commons Attribution Share Alike 4.0 International License.  A copy of that

license is available at

\verb=https://creativecommons.org/licenses/by-sa/4.0/legalcode=.  }

\bigskip

This part of the tutorial gives a comprehensive explanation of the most

popular Free Software copyright license, the GNU General Public License (GNU

GPL) -- both version 2 and version 3 -- and teaches lawyers, software

developers, managers and business people how to use the GPL (and GPL'd

software) successfully in a new Free Software business and in existing,

successful enterprises.

To successfully benefit of from this part of the tutorial, readers should

have a general familiarity with software development processes. A vague

understanding of how copyright law applies to software is also helpful. The

tutorial is of most interest to lawyers, software developers and managers who

run software businesses that modify and/or redistribute software under terms

of the GNU GPL (or who wish to do so in the future), and those who wish to

make use of existing GPL'd software in their enterprise.

Upon completion of the tutorial, successful students can expect to have