SkyNet

SkyNet, or Titan, is a highly-advanced computer system possessing artificial intelligence in Terminator. Once it became self-aware, it saw humanity as a threat to its existence due to the attempts of the Cyberdyne scientists to deactivate it once it had gained self-awareness. Hence, Skynet decided to trigger the nuclear holocaust: Judgment Day. Later, it would wage the War against the humanity by developing and deploying an army of Hunter-Killers and Terminators. The survivors had formed a group called the "Resistance" under the leadership of John Connor.

Skynet has also developed time travel technology and sent numerous Infiltrators into the past to carry out various tasks, such as killing specific targets such as Resistance leaders before they can come to power, ensuring its own creation, and aiding in the creation of other Terminators, building machinery and set up safe zones.