\lcTex{\chapter*{Preface}} \lcHtml{\chapter{Preface}} \cgal\ is a {\em Computational Geometry Algorithms Library} written in \CC, developed by a consortium consisting of \ccAnchor{http://www.inf.ethz.ch/}{ETH Z\"urich} (Switzerland), \ccAnchor{http://www.inf.fu-berlin.de/}{Freie Universit{\"a}t Berlin} (Germany), \ccAnchor{http://www.inria.fr/Equipes/PRISME-eng.html}{{\sc Inria} Sophia-Antipolis} (France), \ccAnchor{http://www.informatik.uni-halle.de/}{Martin-Luther-Universit{\"a}t Halle-Wittenberg} (Germany), \ccAnchor{http://www.mpi-sb.mpg.de/}{Max-Planck Institut f{\"u}r Informatik}, Saarbr\"ucken (Germany), \ccAnchor{http://info.risc.uni-linz.ac.at/}{{\sc Risc}} Linz (Austria) \ccAnchor{http://www.math.tau.ac.il/}{Tel-Aviv University} (Israel), and \ccAnchor{http://www.cs.uu.nl/}{Utrecht University} (The Netherlands). You can find more information about the project on the \ccAnchor{http://www.cgal.org}{\cgal\ home page} \ccTexHtml{at URL {\tt http://www.cgal.org}}{}. Should you have any questions, comments, remarks or criticism concerning \cgal, please send a message to \ccTexHtml{{\tt contact@cgal.org}}{<contact@cgal.org>}. \section*{Editorial Committee} \input{Manual/editors} \section*{Authors} Lutz Kettner (ETH Z\"urich)\\ Andreas Fabri ({\sc Inria} Sophia-Antipolis). \section*{Acknowledgement} This work was supported by the ESPRIT IV Long Term Research Projects No.~21957 (CGAL) and No.~28155 (GALIA). %\cleardoublepage