| Sir James Lighthill | Colour paper printout provided by Professor D. G. Larman, Department of Mathematics, UCL. |
| Professor J.-L. Lions | Taken at the 12th International Conference on DDM, Chiba University, Japan, October 1999. |
| DCABES2001. | Taken at the International Symposium on Distributed Computing and Applications to Business, Engineering and Science, Wuhan University of Technology, 16-19 October, 2001. |
