SAP REMOTE FUNCTION CALL GLOSRY documentation, setup help and example usage

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Remote Function Call
Call of a function module that runs in a different system ( destination ) as the calling program. Possibilities include connections between different AS ABAP or connections between an AS ABAP and an external system. Specially programmed functions, whose interface simulates a function module, are called in external systems instead of function modules. There are synchronous
, asynchronous , and transactional function calls. The system is called up using the RFC interface .
ABAP_MORE_INFO