The following documentation contains more information about the ABAP Workbench and ABAP programming:
ABAP Workbench Tutorial. This documentation provides an introduction to the tools in the ABAP Workbench. You will learn how to simple ABAP application using the Workbench.
ABAP User’s Guide. A comprehensive guide to the individual parts of an ABAP program. It contains information about both basic and advanced ABAP programming, including the techniques of list and transaction processing.
ABAP Dictionary. An introduction to ABAP data. Basic objects and aggregated objects are discussed. Information is provided on maintaining dictionary objects and several special subjects are covered.
Transport Organizer This book explains how to organize large projects in the R/3 system. Setting up the organizer and the transport system are described in detail. Information is provided about version control and modification support.
Extended Function Library . Information about a range of standardized dialogs for address management, application logs, and archiving.
Basis Programming Interfaces Describes the programming interfaces for SAP components. These interfaces include the background processing system and the batch input system.