WCF/WF - Scenarios for WCF

Hello,
I would like to know the real-time scenarios wherein WCF technology can be used for developing applications.
Please guide me on the same.

Thanks in advance.

You can find out about WCF at the WCF site:

http://msdn.microsoft.com/en-us/netframework/aa663324.aspx

and Workflow Foundation at the WF site:

http://msdn.microsoft.com/en-us/netframework/aa663328.aspx

There are plenty of examples and scenarios there.