DESKTOP TIER

The client interface is provided through HTML for HTML-based applications, and via a

Java applet in a Web browser for the traditional Forms-based applications

APPLICATION TIER:

The application tier managing communication between desktop tier and the database tier. This tier is sometimes referred to as the middle tier. Hosting the various servers and service groups that process the business logic.

Three servers or service groups comprise the basic application tier for Oracle Applications:

• Web services

• Forms services

• Concurrent Processing server

In R12 Web, forms services are provided by Oracle Application Server 10g.