The main purpose of this paper is to make a classification of all probable objects from the standpoint of their appointment to a subject. An object of any kind is an object of my reason, my mind, my memory, my consciousness, my soul or my imagination. When a physical thing is in front of us we call that thing we obtain from it "intuition". We call this object type of a physical thing that is provided by a single form of sensitiveness (by means of sight) an object of intuition. In the case of an event I do not witness personally but which is provided by means of media instruments such as newspapers or TV, it is also sensitiveness which provides me with the appearance of a physical thing on a two-dimensional surface. We call this type, provided by all visual techniques, an object of appearance. When neither the physical thing from which I obtain the intuition nor its appearance is in front of me and when, instead, I create them in my mind, the representation I obtain we call a mental object. I feel a sense of pain that I receive from any part of my body or a sensation of joy in my soul as they are, not from any perspective. We call this type of object, perceived by the consciousness and the soul, a psychological object. The intellect or mind acquires representations and concepts from things outside the subject; reason creates its own concepts and objects. All mathematical-logical objects-concepts, operations made by them, definitions, demonstrations and constructions are of objects of reason. Here, we shall talk about yet another kind of object that is a combination of object of reason and object of intuition. These objects which exist in the sciences as principles, we call objects of inference, in the sense that they are objects which reason infers from objects of intuition or, in other words, objects created by reason through inference. We shall now speak of objects of imagination as a last kind in our classification. These objects are not objects of intuition or representations of something that the subject either found directly in itself (in its soul and/or body) or in something outside of itself. The object of imagination is an object that may always be visualized in a ways.