Knowledge, or knowledge, is a structure for producing and organizing findings about the natural world, in the form of explanations and testable predictions of epistemology, dealing with the three elements of data, information, and knowledge. In other words, epistemology discusses knowledge and its constituent elements, namely data and information. If we consider knowledge to have a paired and dual nature, each knowledge is both hard (i.e., definable and demonstrable) and soft (i.e., unstructured, expressive, and representable). The only degree and degree of this mixture is two species that differ in different sciences. The concept of knowledge management has been used practically but informally for a long time. Therefore, in order to better understand the concept of knowledge management, we first examine the concepts of data, information and knowledge and the differences and relationships between them. Knowledge is neither data nor information However, they are related to both and their differences are not necessarily substantial and are simply hierarchically different. Data, information and knowledge are not concepts that can be used interchangeably. Understand these three words and how to get from one to the other. Another is very important in the success of scientific work.