The documentation is divided into five sections: Introduction to ABAP:
This contains the basics of application programming in the R/3 System. This information is essential for an understanding of ABAP programming. Following an overview of the
R/3 Basis system, it introduces the essential features of application programs and the ABAP programming language. Finally, it gives a short introduction to how you can
create an application program in the ABAP Workbench.