CICS® has always provided a robust transaction processing environment. For example, it:
In recent years, much emphasis has been placed on continuous operation and high availability of CICS. Use of sophisticated technologies, such as the Parallel Sysplex®, with resource managers sharing data across the sysplex, has led to improved system availability through the elimination of single points-of-failure. CICS business transaction services (BTS) bring a similar sophistication to the CICS application programming interface (API), making it better able to model complex business transactions.