This tutorial walks you through creating an advanced analytical service.  We will be creating a stock quoting service initially and then we will be adding features as we go to explore more complex and useful concepts of grid services.  After we create the simple service capable of generating stock quotes we will make a stateful service which will be able to manage stock portfolios.  Once we have the ability to manage portfolios we will then add security enabling us to protect access or modification of our portfolios.
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