I am a high school student, and I have been thinking about the way knowledge is structured. In schools and universities, we study subjects such as mathematics, physics, biology, and many others. This has led me to wonder: exactly how many subjects exist in total? It is generally understood that all the knowledge humanity currently possesses is finite and organized into distinct areas. I am interested in knowing whether there exists a comprehensive list, table, map, or conceptual framework that captures the entire body of known human knowledge without excluding anything. In other words, I am seeking a complete and exhaustive classification of all subjects, such that no area of knowledge is left unaccounted for. I wish to ensure that I am not unaware of any subject.