External CICS interface

The external CICS® interface (EXCI) is an integral part of CICS Transaction Server for z/OS®, Version 3 Release 1. The function is called an external CICS interface because it enables non-CICS application programs (client programs) running in MVS™ to call programs (server programs) running in a CICS Transaction Server for z/OS, Version 3 Release 1 region and to pass and receive data by means of a communications area.

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