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The backend servers would include CORBA objects from Educom's IMS projects; Video servers and Oracle database defined curricula pages from NPAC
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The front end servers would include distributed students with mirror sites to get performance
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In the middle tier, we have JDBC query processing and XML servlet parsers mapping original data in optimal fashion to match needs of student -- choosing from pure HTML or Interactive Java Whiteboard views of a given object
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middle tier servers include speech to text converters (for deaf) and text to speech converters (for blind) etc.
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