 Now, I've got to set all that aside, though, because we can talk about some other types of system management, some of the stuff we were taught by Grandma. Maybe you don't need the air conditioning to run at night while you're sleeping because the outside temperature is lower than what your air conditioning temperature is, and you can bring in that air. Some of you may not have the ability to open windows, or you don't want to for security reasons or whatever. So you can...