The book is about preparation and Characterization of Molybdenum Oxysulphide Thin Film using the Metal Organic Chemical Vapour Deposition method. The book is divided into five chapters for easy reading. Chapter one deals with general introduction, chapter two some review on the materials itself and some of the intermediate materials. Chapter three is on the experimental methodology adopted while chapter four provide some of the basic results. Chapter five then concludes the findings and also present some suggestions.