CICS architecture and components

The general software architecture of CICS® is shown in Figure 1. From the figure, you can see that CICS forms a layer of middleware between your business applications and the operating system. Business end-users see only the application interfaces and need not know anything about the underlying architecture.

Figure 1. General TXSeries® for Multiplatforms architecture
General architecture

For information about the different components of CICS, see CICS components.