This thesis aims to discuss the prosthetic quality of technology whilst considering prosthesis as a ‘concept’ in debt to a series of problematics that exceed the common definition of the word in the medical context. Departing from Freudian theory and criticism, the prosthetic quality of technology is taken into hand in relation to certain anxieties and instincts that stamp the construction of subjecthood. Additionally, the dilemma embedded in the psychical ‘program’ that ascribes a prosthetic quality to technology, is depicted with reference to a further discussion on technology and prosthesis.