Web sources to Learn SAP ABAP

some useful websites for learning sap abap:-

1. http://www.sapbasics.com/

2. http://www.saphub.com/abap-tutorial/

3. http://scn.sap.com/community/chinese/technology/blog/2013/04/10/intro  duction-to-sap--part-1-erp

4.http://sapconsultancy.in/wordpress/2013/04/06/sap-abap-interview-question/?fb_source=pubv1

5. http://www.saptraininghub.com/abap-tutorial/