system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: When you restart a PC, does it completely "shut down"? If it does, what tells it to power up again? If it doesn't, why does it behave like it has been shut down?
gpt
ELI5 answer
When you restart a PC, it does not shut down completely. 

Someone used a metaphor for a chef so I'll use that too. Shutting down completely would be like if the chef cleaned up and went home. Holding the power button down to shut down faster would be like if the chef didn't clean up and just left a mess and went home. 

Restarting the computer is telling the chef to clean up everything and then set everything back up without him leaving the building. So, it's not totally "shut off" in that sense because the chef is still there to set things back up, and he knew that was the plan in advance!