Thank-you for u r response I want to know few more things from you that, what are the differences of on-prem SNOW and SNOW in creating Applications, Forms, Service catalogs, Reports and Gauages, Field Administration,Scripts (Client/Server),UI Building Blocks,Workflows, Email logs, Import sets, Data sources ,User Administration, IM, PM,CM

and if u have documents on "how to maintain and support On -Premises SNOW" please share it to me.

Thanks

Mahesh R