Technological systems may refer to a hierarchically nested structure of technological parts, whereby the system is seen as a composition of interdependent sub-systems that are themselves systems comprising further sub-systems.[3] In this manned the holistic system and its properties are seen to be synthesized through the sub-systems that constitute them. Technological systems may also be seen as socio-technical systems that contain both technical and social sub-systems, such as the creators and users of technology, as well as overseeing regulatory bodies. In both perspectives, technological systems are imputed to be goal-seeking, therefore evolving towards objectives.[4]