Cluster Sites

• The Alivisatos Group, University of California Berkeley, USA.
• A.W. Castleman's group, Pennsylvania State University, USA.
• Hellmut Haberland's Group, University of Freiburg, Germany
• Martin Jarrold, NorthWestern University, USA.
• Roy Johnston and the Birmingham Cluster Web, University of Birmingham, UK.
• T.P. Martin's Group, Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany.
• S.J. Riley's group, Argonne National Laboratory, USA.
• R.L. Whetten's Group, Georgia Institute of Technology, USA.
• Ludger Wöste's group, Freien Universität Berlin, Germany.

Global Optimization

• Carlos Barron, University of Houston, USA
• Christodoulos Floudas, Princeton University, USA
• Bernd Hartke, University of Stuttgart, Germany
• Fabio Schoen, University of Florence, Italy
• Kluwer's book series on Non-convex Optimization and its Applications

Computer Simulation Groups

• Atomistic Simulation Group, Queen's University Belfast.
• Bruce Berne's group, Columbia University, USA.
• David Chandler's group, University Of California Berkeley, USA.
• Daan Frenkel's group, FOM Institute for Atomic and Molecular Physics, The Netherlands.
• Materials Modelling Laboratory, Oxford University.
• Berend Smit's group, University of Amsterdam, The Netherlands.

Complex Networks

• Luis Nunes Amaral, Northwestern University, USA.
• Albert-Lázló Barábasi, University of Notre Dame, USA.
• The Erdös Number Project.
  Jonathan Doye's Erdös Number is three.
  Doye number networks associated with various of his presentations.
• Jose Mendes, Universidade do Porto, Portugal.
• Mark Newman, Sante Fe Institute, USA.
• Pajek, a package for network analysis and drawing.