The book is devoted to calculation methods of a converging-diverging nozzle used in propulsion and the high velocity flow. The algorithms and programs given in the book are intended to help engineers and students to design and calculate the nozzle parameters to provide optimal parameters for compressible supersonic flows. The present monograph is a tutorial (handbook) to calculate and determine the optimal parameters for converging-diverging nozzles provided supersonic flow. The main program consists from three main parts: programs for calculation the profile of the Contraction zone, EOD code for the flow in the Contraction zone, the program Rott-Crabtree for calculation the pressure gradient Pohlhausen parameter, the program for the aerodynamic design of axisymmetric and two-dimensional nozzles for supersonic and hypersonic wind tunnels, programs for solving laminar, transitional, or turbulent compressible boundary layer equations for two-dimensional and axisymmetric flow, and the program to obtain hypersonic boundary layer stability. The book is designed to be an instrument for students and scientists interested in study supersonic flow and high-temperature gas dynamics.