In the hand that holds the butt of an axe, are it human fingers that become embedded in the wood? Or is it the shape of the wood that adheres to the arm, lengthening it, and making it more powerful? In the hand that activates the tiny switch to illuminate a room, are the fingers components of the structure of silent cables that live between walls and escape to the street lines? And the lit lamp, so "alien" to the human body that moves freely when night falls, what is it an extension of? What is it incorporated into? These questions constitute starting points for the study of the subject-technology relationship and the contrast of its humanistic and analytical foundations. From the contributions of authors such as Lewis Mumford, Martin Heidegger, José Ortega y Gasset, Jacques Ellul, Friedrich Dessauer, Gilbert Simondon, Friedrich Rapp and Mario Bunge, the continuities and ruptures that encode this relationship are addressed.