1. Natural Sciences: Includes the study of the physical and biological world, such as physics, chemistry, biology, and geology. 2. Social Sciences: Focuses on human societies, their interactions, and behavior, including sociology, anthropology, psychology, and political science. 3. Humanities: Explores the human condition through literature, philosophy, history, art, and music. 4. Formal Sciences: Deals with abstract systems and logical reasoning, including mathematics, computer science, and statistics.