Photochromic Polymers.- Photodegradation of Organic Photochromes.- Photokinetics under Continuous Irradiation.- EPR and Radical Processes.- Molecular Modeling Calculations.- The Enantiomers of 2-Donor-Substituted Benzopyrans and Benzo-1,4-oxazines and Their Thermal Racemization.- Structural Studies by X-Ray Diffraction.- New Trends in Raman Studies of Organic Photochromes.- Biological Applications- Supramolecular Chemistry.- Thermochromism of Organic Compounds.