Applications of Operations Research. An overview. Linear programming. Queueing problems. Discrete event simulation. A shortest path problem. References. Artificial Intelligence: Expert and Knowledge Based Systems. Artificial intelligence and expert systems. Expert systems. Structure of expert systems. Knowledge representation. The interference engine. The interaction module. Tools. Developments of an expert system. Conclusion. References. Artificial Neural Networks. Introduction. Historical overview. The basic unit -- the neuron. The linear learning machine and the perception network. Multilayer feed forward (MLF) networks. Radial basis function networks. Kohonen networks. Adaptive resonance theory networks. References;