This lecture covers the fundamentals of mass transfer, diffusion, and transport, including topics such as Fick's equations, Nernst-Einstein equation, and transport forces. It explores diffusion in various materials, from cubic crystals to ionic crystals, and discusses the influence of temperature and pressure on diffusion processes. The lecture also delves into the diffusion coefficient, dissemination mechanisms, and diffusion in compound alloys. Examples of mass transfer and transport forces are provided to illustrate the concepts discussed.