Android

Androids are mechanical/robotic constructs built to take on the appearance and physical characteristics of a living being. While all androids may be robots, not all robots are androids. R2-D2 for example is designed to fulfill a specific function, which does not include direct interaction with living beings and as such, could never be confused for one. His partner, C-3P0 however, while ostensibly a robot, is constructed to emulate certain physical traits common to sentient bipedal races including ocular vision, articulated limbs, joints, phlanges, etc. Androids are also distinguished from cyborgs in that they are completely artificial with no organic components.

Highly advanced androids can be programmed to imitate human behavior and, depending upon the design, may even pass themselves off as human. Some androids have even convinced themselves that they are human. By and large, androids are non-sentient entities regardless of how lifelike they may appear. There have been many situations however, where an android's programming will become so advanced that it will achieve self awareness and develop into an artificial intelligence. A self aware android will develop the capacity for human emotion, a sense of expression, as well as desires and objectives beyond its original programming.