The main features of software agents are: situatedness, that is the ability to perform actions according to a particular input received from outside, which can turn, change the environmental itself, autonomy in performing actions, without interventions of humans; flexibility and adapatability. Some particular agents can also be pro-active, which means they are goal directed, and social, in the way they can interact with other agents, robots, and humans. Such intelligent agent, can be referred to as Belief-Desire-Intention (BDI) one.