Customer Information Control System, a family of mixed-language application servers that provide online transaction processing and connectivity for applications on IBM mainframe systems.
Acronym created by IBM in 1968, standing for Customer Information Control System. Originally developed to handle multiple terminal users accessing mainframe applications simultaneously, revolutionizing online computing.
CICS represents one of computing's most enduring technologies, still processing billions of transactions daily in banks, airlines, and government systems worldwide. Despite being over 50 years old, it demonstrates how well-architected systems can remain relevant across multiple technological generations.
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