Johannes Gerbershagen describes what you should know as an ABAP Developer about Polymorphism. Do you know what the meaning is of class, object and instantiation? If not, enjoy the explanations of Sabrina.
Olga Dolinskaja collected in her Blog the most important Blog Posts about ABAP Development Tools Tutorials – Learn how to use ABAP in Eclipse. A must-read for every ABAPer who like to sharpen his Toolset