Siebel Error Codes are most challenging barriers for a developer. It’s very difficult to understand the exact problem in configuration by seeing the error codes. Consultant spent their important time in searching at number of blogs and oracle metalink support to find the correct explanation of the Siebel Error Codes. We are providing you a library of all siebel error codes to make your search efficient.

This thread is trageted to discuss the possible ways to restrict duplicate sessions in siebel application.
 

The Siebel File System consists of a shared directory that is accessible to all Siebel Servers in the Siebel Enterprise. It contains the physical files used by the Siebel clients and Siebel Servers.

In a Web SSO implementation, users are authenticated by a third party at the Web-site level. Siebel Business Applications support this mode of authentication by providing an interface that allows the third party to pass user information to a Siebel application. Once authenticated by the third party, a user does not have to explicitly log into the Siebel application.
Single sign-on (SSO) is a session/user authentication process that permits a user to enter one name and password in order to access multiple applications. The process authenticates the user for all the …

Application Object Managers (AOMs) host the Business Objects layer and Data Objects layer of the Siebel architecture.
 It is a server component that creates and processes data at multiple levels.

UI layer (supported by the Siebel Web Engine) 
Business object layer 
Processes business logic
Data object layer (supported by Data Manager)