This chapter contains sections titled: Evaluation of Chemical Energy Heats of Formation of Reactants and Products Oxygen Balance Thermodynamic Energy Crystalline and Polymeric Materials Physicochemical Properties of Crystalline Materials Physicochemical Properties of Polymeric Materials Classification of Propellants and Explosives Formulation of Propellants Nitropolymer Propellants Single-Base Propellants Double-Base Propellants Triple-Base Propellants Composite Modified Double-Base Propellants Composite Propellants AP Composite Propellants AN Composite Propellants Nitramine Composite Propellants TAGN Composite Propellants Black Powder Formulation of Explosives Industrial Explosives Military Explosives