This lecture covers the development and applications of 2D electronic devices and materials, focusing on topics such as graphene, transition metal dichalcogenides, excitons, logic in memory, and valleytronics. The instructor discusses the challenges and opportunities in the field, showcasing recent examples like PtSe₂ and monolayer MoS₂ transistors. The presentation also delves into the energy efficiency aspects of information technology and the potential of 2D materials in revolutionizing traditional electronics.