Siebel Architecture

Hello ,
when we talk about Siebel architecture.we can define siebel architecture in three ways.
1.Siebel Operational Architecture
2.Siebel Interface Architecture
3.Siebel Object Architecture

“siebel Operatinal Architecture” : when a client send request to server.how it works is come under Siebel Operational Architect , when a client request , it comes to SWSE and SWSE has SISNAPI interface to directly talk with AOM through Gatewayserver.SWSE invoke session manager that handle SISNAPI request.We can set SISNAPI ideal time at Server level AOM.SISNAPI approaches to AOM and AOM reads Srf and choose apropriate Template.and data manager fetch data from underlying DB and Mapp data with template and generate HTML and send back to clinet.this is overview of Operational Architecture.
“Siebel Logical Architecture : : Like base for View is Business Object and Bo is collection of BC.BC is association between columns of tables.Screen is collection of Views and application is collection of Screen.Links , joins are also part of logical architecture.

“Siebel Interface Architecture : : 1. COM
2.CORBA
3.Com Server
4. Java

I am not quite sure about above only. We could access Siebel through COm object.Even when we access Siebel through IE , it first down load Active x Control thoese are also part of COM.

Above is just my understanding.

Regards,
Danish