[Manual] Application Platform

SAP Web Application Server provides a complete development infrastructure on which you can develop, distribute, and execute platform-independent, robust, and scalable Web services and business applications. SAP Web Application Server supports ABAP, Java, and Web services.

The link address is:http://help.sap.com/saphelp_nw04/helpdata/en/17/f1b640c9aa054fa12493e48912909c/frameset.htm