The Little Book of Semaphores

This web-based edition was was mangled by Matt Jadud from the Version 2.1.5 LaTeX sources, provided by Allen B. Downey. In particular, hints and solutions were edited out in most cases; in some cases, new text scaffolding the students' thought processes is provided. The goal is to use the LBoS (Little Book of Semaphores) to provide an active, discursive framework for ongoing individual and group exercises in an undergraduate operating systems course. This version is made available under the same license; original copyright and license information follows.

— Matt Jadud, 2013

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Second Edition

Version 2.1.5

Copyright 2005, 2006, 2007, 2008 Allen B. Downey

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; this book contains no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.

You can obtain a copy of the GNU Free Documentation License from www.gnu.org or by writing to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

The original form of this book is LaTeX source code. Compiling this LaTeX source has the effect of generating a device-independent representation of a book, which can be converted to other formats and printed.

This book was typeset by the author using latex, dvips and ps2pdf, among other free, open-source programs. The LaTeX source for this book is available from http://greenteapress.com/semaphores.