We know about subjects or disciplines of human knowledge that we study in schools and universities Science, commerce, humanities Arts Etc I want to know exactly how many areas of knowledge are there in total I mean a list of all the disciplines of knowledge in all universities of the world

There isn't a definitive list with an exact number of all disciplines of knowledge offered at universities around the world. This is because knowledge itself is constantly evolving, and new fields of study are emerging all the time. However, there are broad categories that encompass many of the disciplines offered at universities. Here's a breakdown of some of the major ones:

• Humanities - This field explores human history, culture, language, philosophy, and religion. Some examples of disciplines within the humanities include history, literature, linguistics, philosophy, religious studies, and visual arts.
• Social Sciences - These disciplines examine society and human behavior. Examples include anthropology, economics, political science, psychology, and sociology.
• Natural Sciences - This broad category focuses on the physical world and its phenomena. Examples include astronomy, biology, chemistry, physics, and earth sciences.
• Formal Sciences - These disciplines use logic and symbols to understand structure and relationships.  They include mathematics, computer science, statistics, and logic.
• Professions and Applied Sciences - These fields apply knowledge from other disciplines to solve practical problems. Examples include engineering, medicine, law, education, agriculture, and business.

Keep in mind that this is not an exhaustive list, and there is a significant amount of overlap between these categories.  For instance, environmental science combines aspects of natural sciences and social sciences.

Each university will have its own unique focus and strengths, and the specific disciplines offered will vary depending on factors like location, size, and research focus.

hope this helps you!!