SAP� launched the first version of WAS in September 2001, when it was known as SAP� Basis. It provided open usage capabilities such as a native Web enabling infrastructure, the adoption of latest technical standards, like HTTP, HTTPS, XML, SMTP and SOAP. But within a year, in May 2002, SAP launched WAS version 6.20 which has many additional features over version 6.10.
Additional features in SAP WAS 6.20
In SAP WAS version 6.20, XSLT engine has the onus of transferring XML documents. It is also used for transformation between ABAP, XML, HTML, or any other text-based format.
The Web Dynpro technology, which provides a sophisticated development and runtime environment for Web applications based on server-side scripting.
Cluster management functionalities and advanced load balancing are one of the key features with SAP WAS version 6.20.
Add-on tools for Java integrated development environments (IDEs).