An agent is a computational entity similar to a software program that can be viewed as perceiving and acting upon its environment and autonomous in its behaviors partially depending on its own experience. An agent on the basis of any key process such as problem solving, planning, decision- making and learning achieves behavior flexibility and rationality. Multi-agent systems are those in which several agents employ their knowledge and coordinate their activities and reason about the processes of coordination. Distributed problem solving systems are those in which the work of ...