Network Definition 

"Whenever more than two units (e.g., persons, organisations, or computer terminals) are connected and share some attribute, a network is formed". This statement explains in a simple language the concept of a network. In other words, in an abstract sense, network means modes of interaction between people. However; there are three categories of networking which may be said to have considerable impact on information services. These are communication networks, computer networks and library and information networks.