Interatomic Potentials: Quantum Mechanical Treatment of the Many-Particle Problem; Potential Energy Surface; Pair Potential Approximation; Advantages and Limitations of the Pair Potential Approximation; Phenomenological Potentials; Pseudo-Potentials; Many-Body Potentials; Molecular Dynamics (MD): Models for MD Calculations; Visualization Techniques; Solution of the Equations of Motion; Efficient Force Field Computation; Implementation; Characterization of Nano-Systems: Thermal Stability; Basic Material Properties; Wear at the Nanometer Level; Mean Values and Correlation Functions; Nano-Engineering - Studies and Conclusions: Nano-Machines; Nano-Clusters; Stimulated Nano-Cluster Transformations; Analogy Considerations; The Bifurcation Phenomenon at the Nanometer Scale; Analogies to Biology; Final Considerations.