simple....domains related to insurance company and erp company.

ERP ( enterpriseresource planning ) . Lets take one example 
in company there are different deparments like 
developement , testing , hardware , networking , Hr . 
Company has its branches across the world .So if the HR of 
the company sit in pune's branch and he / she wants to 
access the information of the banglore brach the he/she can 
do this because in 	ERP there is single database , 
information of all departments are store in single 
database .It has  three tier architecture 1) presentation 
layer 2) application layer 3 ) DATABASE