Space and other configuration elements.- Space is an essential element in the formation of informal systems. The first requirement is communication; easy and fast communication is that which arises from direct contact, in particular in certain daily acts that are more or less permanent, such as having lunch together, meeting in the same transport vehicles, etc .; they constitute means of solidarity, that is to say, that the nucleus of an informal organization, of the so-called by the American terminology type “clique”, can be a non-technical element, or even a labor one.