Alv, Bapis, Abap Oops, Adobe Forms, User Exits, Odata Services, Cds Views, Enhancements, Amdp, Idocs, Web Services, ABAP RESTful Architecture, rap, Agile Waterfall development, modern Interfaces, BTP, S 4HANA, third-party platforms, Fiori-based applications, extensibility, RICEFW objects, ABAP Cloud, Event Mesh