That they are ' ' The necessity of information in function of the knowledge is a necessity that results of the desire to know the necessity of information in function of the action is a necessity that result of material necessities demanded for the accomplishment of activities human beings, professionals and pessoais' '. In this direction, each user can have a different necessity and has that to take in account this. The information has an enormous power when it can be assimilated by the citizen. Coast (2009) cites Barreto (2002, P. 1), ' ' the information is qualified as an instrument modifier of the conscience and the society as a whole. Here the information is qualified as an instrument modifier of the conscience of the man and its grupo' '. But, the society is known that the information alone fulfills its mission effectively, when is prepared to receive it. Of this form, it can generate the necessary knowledge that it frees the man of the darknesses of the ignorance.
It is what they affirm, in the text of the Coast (2009), Dantas (2000) and Barreto (2002), when it is perceived and accepted as such, contributing for the development of the individual, in particular way, and the collective one, from the influence of the individual its social group or entorno stops with. Under the boarding of Taylor (1968) one understands that it focuses the information in the necessity or individual problem of indivduos' '. This is seen with importance, therefore it is necessary to question itself on that information an individual wants to find in the information system. That use will make of it? How the system can better be projected to take care of these necessities of information? 3. WHICH THE IMPORTANCE OF THE USERS? The study of users it reflects a boarding that it looks to place the user in the center of the concerns.