Roman F. Nalewajski is now Professor (Emeritus) of theoretical chemistry at Jagiellonian University in Cracow (Poland). His current research concerns mainly conceptual and methodological issues in quantum chemistry, and particularly density-functional theory (DFT) and information theory (IT) with applications to problems of the chemical bond, molecular electronic structure, and reactivity preferences. His recent interests focus on communication theory of the chemical bond, applying IT in chemical interpretations of molecular states and reactivities, and exploring the phase-equilibria in molecules or their fragments. He is the Author of about 250 scientific publications, two academic textbooks on quantum chemistry (in Polish) and five monographs (in English).