Following are the list of SAP R/3 IBM redbooks. This books explain you an overview of installing SAP Applications in IBM server and platforms like z/0s, os/390 and os/400, etc. You can refer SAP documentation for other information regarding installing SAP applications.
- SAP R/3 on DB2 for OS/390: Database Availability Considerations
- SAP R/3 on DB2 for OS/390: Disaster Recovery
- SAP R/3 on DB2 for OS/390: Implementing with AIX or Windows NT Applications Servers
- SAP R/3 on DB2 UDB for OS/390: Application Servers on OS/390
- Managing SAP R/3 with Tivoli
- Implementing SAP R/3 4.5B Using Microsoft Cluster Server on IBM Netfinity Servers
- Implementing SAP R/3 on OS/400
- Integrating WebSphere Commerce with SAP R/3 Using WebSphere InterChange Server
- High Availability Considerations: SAP R/3 on DB2 for OS
Following are the list of ABAP programming ebooks and other online tutorials available in web. For more information and source code you refer SAP AG site.