Level 0 Data Flow Diagram for a distributed e-commerce bookstore system modeling interactions between users, administrators, and core processes. Users submit orders and browse products while admins manage inventory and system configuration, with all data flowing through a central E-Commerce Bookstore System process. The architecture persists order and product information in dedicated databases, ensuring separation of concerns and scalability. Fork this diagram on Diagrams.so to customize data flows, add payment gateways, or extend for multi-tenant scenarios. This foundational DFD serves as a blueprint for detailed process decomposition and system requirement validation.