House of the Singing Waters

On the walmart issue, it's a urban legend around here that walmart has a highly sophisticated computer system that equals or out ranks NASA, they can tell which employee left the freezer door open in any store in the world, as an example, and it's supposed to be under deep wraps from interference, weather and so forth. Could be the spot? What else it's used for is up for grabs but to just consider the amount of stores, and having a central computer system at all would take a hell of a lot of room. And probably kept very clean and cool...and secret.