Introduction of ABAP

ABAP is Advanced Business Application Programming. It is an high level programming language created by german software company SAP.

The ABAP programming language was originally used by SAP developers to develop the SAP R/3 platform. It was also intended to be used by SAP customers to enhance SAP applications – customers can develop custom reports and interfaces with ABAP programming. The language is fairly easy to learn for programmers but it is not a tool for direct use by non-programmers. Good programming skills, including knowledge of relational database design and preferably also of object-oriented concepts, are required to create ABAP programs.

Few important things about ABAP:
1. All ABAP programs reside inside the SAP database. They are not stored in separate external files like Java or C++ programs.
2. In the database all ABAP code exists in two forms: source code, which can be viewed and edited with the ABAP workbench, and "compiled" code ("generated" code is the more correct technical term), which is loaded and interpreted by the ABAP runtime system.
3. ABAP programs run in the SAP application server, under control of the runtime system, which is part of the SAP kernel.

This is not all ABAP. It is much more. You can find it in ABAP in 21 days. It is good for new abap programmers.