SAP - Web Dynpro
Web Dynpro (WD) is a proprietary web application technology developed by SAP SE that focuses on the development of server-side business applications. One of its main design features is that the user interface is defined in an entirely declarative manner.
The earliest version of Web Dyn in 2003 and was based on Java. This variant was released some 18 months before the ABAP variant.
The Java variant of Web Dynpro experienced limited commercial success, and as of 2010, has been placed in maintenance. This means that the existing product is supported to the extent that any bugs are fixed; however, no new functionality will be added. SAP's development effort is now focused on the ABAP variant of Web Dynpro.
WD follows a design architecture based on an interpretation of the MVC design pattern and uses a model driven development approach ("minimize coding, maximize design").