C.H.A.O.S. is from an outdated, overlooked boring game I used to play called The CHAOS Continuum. Its a game about scientists who have mistakenly created a sentient computer that is threatening mankind if they attempt to destroy it and you have try to track it down by downloading information and stuff. Much of its quotes are also in the fic. In the game, CHAOS stands for Cybergenetic Holistic Autonomous Orbiting Sever.
What makes the game interesting is CHAOS himself.