Master Customer Information Control System (CICS) - the premier transaction processing system for mainframe environments.
Customer Information Control System (CICS) is IBM's premier transaction processing system for mainframe environments. It provides the infrastructure for building and running online transaction processing (OLTP) applications that can handle thousands of concurrent users and millions of transactions per day.
Handles real-time transaction processing with high availability and reliability
Supports thousands of concurrent users and transactions
Manages programs, files, databases, and communication resources
Integrates with RACF and other security systems
CICS remains a critical technology in enterprise computing, powering many of the world's largest financial institutions, airlines, and government systems. Understanding CICS is essential for:
Our CICS tutorials are organized to take you from complete beginner to advanced practitioner. Start with the fundamentals and progress through application development, system administration, and modern integration techniques.
Understanding CICS architecture and basic concepts
Building CICS applications with COBOL, PL/I, and Java
Managing CICS regions, resources, and performance
Connecting CICS with databases, web services, and modern systems
Security, monitoring, troubleshooting, and optimization
While our tutorials are designed to be beginner-friendly, some familiarity with mainframe concepts will be helpful. We recommend completing our JCL and COBOL tutorials first for the best learning experience.