Efficiency and Nondominance.- The Weighted Sum Method and Related Topics.- Scalarization Techniques.- Other Definitions of Optimality - Nonscalarizing Methods.- Introdcution to Multicriteria Linear Programming.- A Multiobjective Simplex Method.- Multiobjective Combinatorial Optimization.- Multiobjective Versions of Polynomially Solvable Problems.- Multiobjective Versions of Some NP-Hard Problems.