BAPI:

BAPI is a RFC enabled function module and we CREATE business objects and registered in the BOR (Business Object Repository) which can be accessed outside the SAP system by using other applications (Non-SAP) LANGUAGES such as VB or JAVA. That time we only define the business object and its methods from external system.

RFC:

COMMUNICATION between applications of different systems in the SAP environment INCLUDING connections between SAP systems as well as between SAP systems and non-SAP systems. Remote Function Call (RFC) is the STANDARD SAP interface for communication between SAP systems. The RFC calls a function to be executed in a remote system.

BAPI:

BAPI is a RFC enabled function module and we create business objects and registered in the BOR (Business Object Repository) which can be accessed outside the SAP system by using other applications (Non-SAP) Languages such as VB or JAVA. That time we only define the business object and its methods from external system.

RFC:

Communication between applications of different systems in the SAP environment including connections between SAP systems as well as between SAP systems and non-SAP systems. Remote Function Call (RFC) is the standard SAP interface for communication between SAP systems. The RFC calls a function to be executed in a remote system.