Differences between WAS and WPS

WAS(Websphere Application Server)	WPS(Websphere Portal Server)
WAS provides platform of WPS.	WPS is one of enterprise Application in WAS (wps.ear).
WAS is not depend on database.	WPS  is depend on database.
Personalization   is limited to each application.	Provides very good  personalization.
WPS Authentication is done in WAS.	WPS can do only authorization.
Configuration data’s are stored in XML and property files.	Configuration / personalization data’s are stored in database , XML and property files.
Performance Measurement about page/portlet is measured in WAS.	Performance Measurement about page/portlet is not measured  in WPS
Both war/ear files can be deployed	Only war files can be deployed
We can develop portlet application.	Can develop Plain J2EE application, advanced J2EE Application. Using portlet container in WAS6.1, we can develop portlet application.
Portlet is directly accessible using URL.	In WebSphere Portal, you cannot directly access a portlet through a URL.
Security role references are currently only supported by WebSphere Application Server.	Security role references are not maintained in WebSphere Portal Server.