Superconductors and Superconductivity: General Issues / Ivan Parinov -- Composition Features and HTSC Preparation Techniques / Ivan Parinov -- Experimental Investigations of HTSC / Ivan Parinov -- Carbon Problem / Ivan Parinov -- General Aspects of HTSC Modeling / Ivan Parinov -- Modeling of BSCCO Systems and Composites / Ivan Parinov -- Modeling of YBCO Oxide Superconductors / Ivan Parinov -- Computer Simulation of HTSC Microstructure and Toughening Mechanisms / Ivan Parinov -- Mechanical Destructions of HTSC Josephson Junctions and Composites / Ivan Parinov -- Modeling of Electromagnetic and~Superconducting Properties of HTSC / Ivan Parinov