The User Service tier creates a visual gateway for a consumer to interact with the application. This ranges from basic HTML and DHTML to complex COM components and Java applets.
In this tier it grabs business logic and procedures. This tier ranges from Web scripting in ASP/PHP/JSP to server side programming such as TCL, CORBA and PERL, allowing the user to perform complex actions through a Web interface.
In this tier Data services store, retrieve and update information at a high level. Databases allow developers to store, retrieve, add, and update categorical information in a systematic and organized fashion.
Design
Develop
Execute
Support