User Interaction: AI Chatbot Interface
Application Layer: Web/App Server + AI Engine
Middleware: REST APIs (JSON/HTTPS), IBM MQ, CICS Transaction Gateway
Mainframe: CICS Region (COBOL / PL/I / Java) with DB2 & VSAM
User ↓ AI Chatbot ↓ Application Server ↓ REST API / MQ / CTG ↓ CICS Region ↓ DB2 / VSAM ↓ Response Back to User