A technical Application Program Architecture Organizational Chart Template for presenting the structure of an enterprise application system and its service modules. The diagram includes surface layer, financial sector, data layer, web server, application server, administration, authority service, system services, report service, buffer service, task management, host system, relational database, message queue, security service, session service, servlet service, EJB service, transaction service, file import service, login service, data access, user preference, and SSO service. Software architects, backend developers, system analysts, IT teams, database administrators, and technical consultants can use it for application architecture documentation, enterprise system design, software deployment planning, technical training, and system integration presentations. The organizational chart layout helps explain service dependencies, server relationships, data access paths, and program module responsibilities.