... three layers: one layer for the client side of information (information searchers), one for the supply or server side of information (information providers), and one layer between these two ... to the user himself.These functions (with exception of the second one) bring us to an important issue: the question whether or not a user should be told where and from whom requested information ... Research:Based on the type of information the user wants, such as information on companies, people, places, and markets, Hoover's research agent will search for information based on the appropriate...