- Nordic MPS '04
- European Applied Business Research Conference (EABR)
- International Conference on Integration of AI and OR Techniques
- III Colombian Congress and the I International Andean conference on Operations Research - CCIO-2004
- First Workshop on Formal Verification of Analog Circuits
- THE 3rd EUROPEAN CONFERENCE ON E-GOVERNMENT
- The 8th International Workshop on Nature Inspired Distributed Computing (NIDISC'05)
- Fourth International Workshop on Ant Colony Optimization and Swarm Intelligence
- The 47th European Study Group with Industry and The Mathematics for Industry Workshop
- 5th European Summer University On The History And Epistemology In Mathematics Education
- The First IEEE Symposium on Artificial Life
- Workshop on Integer Programming and Continuous Optimization
- 6th World Congress on Structural and Multidisciplinary Optimization (WCSMO6)
- IASTED International Conference on Signal Processing, Pattern Recognition, and Applications
- The Brazilian Symposium on Artificial Neural Networks (SBRN)
- Fifth SIAM International Conference on Data Mining
- DASD 2005 Design, Analysis, and Simulation of Distributed Systems
- Symposium on Scientific Computing and Mathematical Software in Emerging Sciences and Technology
- CALCO 2005 1st Conference on Algebra and Coalgebra in Computer Science
- ECEC'2004
