In the pre-NetWeaver days, there was SAP R/3 and you logged on to the system with the SAP GUI, which created a logon session. Your authorizations were granted by assigning profiles to your user ID, which allowed you to execute transactions and access data in tables based on those authorizations. SAP executed ABAP, which is their own programming language, to perform all the functions that had been delivered in the system and configured in the customer's implementation.
In today's environment, we still have the standard R/3 system executing ABAP programs, but we also have a portal environment that executes ...
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