A cyborg, short for "cybernetic organism", is a being with both biological and artificial (e.g. electronic, mechanical or robotic) parts. The term cyborg, coined in 1960, is often applied to an organism that has enhanced abilities due to technology, though this perhaps oversimplifies the necessity of feedback for regulating the subsystem. The more strict definition of Cyborg is almost always considered as increasing or enhancing normal capabilities. While cyborgs are commonly thought of as mammals, they might also conceivably be any kind of organism and the term "cybernetic organism" has been applied to networks, such as road systems, corporations and governments, which have been classed as such. The term can also apply to micro-organisms which are modified to perform at higher levels than their unmodified counterparts.
Fictional cyborgs are portrayed as a synthesis of organic and synthetic parts, and frequently pose the question of difference between Human and machine as one concerned with morality, free will and empathy. Fictional cyborgs may be represented as visibly mechanical (e.g. the Cybermen in the Doctor Who franchise or The Borg from Star Trek); or as almost indistinguishable from humans (e.g. the Terminators from the Terminator films, the "Human" Cylons from the re-imagining of Battlestar Galactica, et cetera).