Android

An android, android robot, or humanoid robot, is an advanced form of robot, equipped with a self-aware artificial intelligence and made to imitate humanoid lifeforms.

Such AI creatures are built with quantum neural networks, encapsulated within a sophisticated, lifelike framework. Androids are useful for interstellar missions, since their appearance and behavior could be made sufficiently human for them to blend in well with biological crew members. At the same time, their superhuman capabilities would allow them to safely negotiate potentially hostile environments. Humans may eventually decide to evolve into androids themselves, with the obvious benefits of being mentally superior, immortal and indestructible.

Examples:

In The Day the Earth Stood Still, the Humans were afraid of an android character named Gort.

Lieutenant commander Data, who served the Federation in Star Trek, was uniquely built with positronic computers and was the only android regarded as sentient.