detail about BO
How 2 start Bo?Whats the tcode for BO?
What are all importance in BO?
Pl can explain briely...
BO is not part of the SAP Product suite, its a seperate product in itself. You dont have any tcodes to start BO, you need to install it seperately.
For more information pls go thru the following links:
http://www.businessobjects.com/ (General overview of the BO Products)
http://help.sap.com/businessobject/product_guides/boexir3/en/xi3_bip_admin_en.pdf (You can find the architecture in this pdf)