This 3-day intensive course, originally planned to be held onsite and now available as an online course, provides a comprehensive introduction to the fundamental and practical aspects of colloid chemistry and colloidal dispersions. The course is focused on particles that are dispersed in liquids. Nearby topics, such as surfactant chemistry, polymers in solution, emulsions and foams are also covered to some degree in order to make the course complete on a stand-alone basis.