Autopilots

noun

1. A mechanical, electrical, or hydraulic system used to guide a vehicle without assistance from a human being.

   "I set the autopilot to due south, so I could get some rest."

2. (by extension) A state of mind where one no longer thinks about doing one's actions, but acts mechanically

   "I've been doing this 12 hours non-stop, and am so hungry and tired that I've stopped thinking: I'm now on autopilot."