CGAL is a Computational Geometry Algorithms Library written in C++, which is being developed by research groups in Europe and Israel. The goal is to make the large body of geometric algorithms developed in the field of computational geometry available for industrial application. We discuss the major design goals for CGAL, which are correctness, flexibility, ease-of-use, efficiency, and robustness, and present our approach to reach these goals. Generic programming using templates in C++ plays a central role in the architecture of CGAL. We give a short introduction to generic programming in C++, compare it to the object-oriented programming paradigm, and present examples where both paradigms are used effectively in CGAL. Moreover, we give an overview of the current structure of the CGAL-library and consider software engineering aspects in the CGAL-project. Copyright c ○ 1999 John Wiley & Sons, Ltd. KEY WORDS: computational geometry; software library; C++; generic programming;

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This document provides an introduction to a system called Arizona, now under development at the U. of Washington. It consists of this overview section, a section outlining suggested style conventions to be followed by contributors to Arizona, followed by a section describing the most basic module in Arizona, called Tools. Additonal reports are available that describe other currently released modules in Arizona [20, 21, 19]. 1.1 The scope of Arizona Arizona is intended to be a portable, public-domain collection of tools supporting scientific computing, quantitative graphics, and data analysis, implemented in Common Lisp and CLOS (the