Data Flow Diagram for a school textbook management system modeling interactions between librarians, students, teachers, and administration. The system encompasses four core processes: catalog management, textbook issuance and returns, debt tracking, and report generation, with data flowing through four persistent stores—book catalog, student records, circulation journal, and reports database. This architecture demonstrates how to organize multi-stakeholder workflows in an educational context, ensuring accountability and resource visibility across the institution. Fork and customize this DFD on Diagrams.so to adapt it for your school's specific policies, add additional processes, or export as .drawio for integration into your technical documentation.