Context level data flow diagrams, also known as level 0 data flow diagrams, are used to define and clarify the boundaries of a software system. It identifies information flows between the system and external entities. The whole software system is depicted as a single process. The most fundamental data flow diagrams are Level 0 DFDs, also known as context diagrams. They provide a broad overview that is easily digestible but lacks detail. Data flow diagrams at Level 0 depict a single process node and its connections to external entities. Context level data flow diagram is a data flow diagram of an organizational system's ten scopes. Demonstrates the system's boundaries, external entities that interact with the system, and the major information flows between the entities and the system.