This course explores the fundamental principles governing surface and colloidal systems, focusing on their significance in chemical, industrial, and biological processes. It covers key topics such as surface tension, adsorption phenomena, wetting, micelle formation, colloidal stability, and the behavior of nanoparticles. Students will gain an in-depth understanding of the thermodynamics and kinetics of interfaces, electrical double layers, and the role of surfactants in emulsions and foams. Practical applications in pharmaceuticals, nanotechnology, catalysis, and environmental science will be highlighted. Through theoretical discussions and hands-on laboratory experiments, learners will develop analytical skills for characterizing surface interactions and colloidal dispersions, equipping them with the knowledge necessary for real-world problem-solving in research and industry.