This chapter contains sections titled: Introduction Mechanistic and Kinetic Details of Living Cationic Polymerization Living Cationic Polymerization Monomers and Initiating Systems Additives in Living Cationic Polymerization Functional Polymers by Living Cationic Polymerization Telechelic Polymers Macromonomers Block Copolymers Branched and Hyperbranched Polymers Conclusions References