CICS stands for Customer Information Control System, a transaction processing system introduced by IBM. Before this system many industries used punched card batch processing for high volume customer transactions as it allowed online transaction processing. CICS replaced this method due to the fact that it sped up the way companies interacted with their customers. It was rapidly adopted by many of the world’s largest banking, insurance, telecommunications, retail, manufacturing, utilities and government organizations to run their core applications. More than 40 years after CICS was first made generally available, IBM’s commitment to deliver innovative and reliable CICS-based technologies means the world’s largest enterprises still trust CICS to run the applications that run their businesses today.