I Computational Methods in Classical Physics -- 1 Motion of a Classical Point-Like Particle -- 2 Short Course in FORTRAN Programming Methodology -- 3 Methods of Higher Accuracy (and Efficiency) -- 4 Finding Extremal Points of Motion -- 5 Statics and Dynamics of Strings -- 6 Dynamics of Strings -- 7 Literature -- II Monte Carlo Simulations in Statistical Physics -- 1 Random Numbers -- 2 Ising Model -- 3 Cellular Automata (Q2R and Creutz) -- 4 Diffusion and Percolation -- 5 Eden Clusters -- 6 Kauffman Model -- 7 Summary -- 8 Appendix: A Short Introduction to FORTRAN -- 9 Literature -- III Principles of Vector and Parallel Computing -- 1 Basic Idea -- 2 An Example - Q2R -- 3 More About Vector Processing -- 4 Before and After the Vectorization -- 5 Parallel Computing -- IV REDUCE for Beginners - Seven Lectures on the Application of Computer-Algebra (CA) -- First Lecture -- Second Lecture -- Third Lecture -- Fourth Lecture -- Fifth Lecture -- Sixth Lecture -- Seventh Lecture -- A Some Additional Exercises -- B Changes From Reduce 3.3 to Reduce 3.4.1 -- C Further Information on Reduce -- C.1 Where Can You Buy Reduce? -- C.2 Execution Times for the Reduce Standard Test -- D Literature -- Joint Index.