I know that naming the shapes has no meaning to the game, but I'm just wondering if the developers privately think of each shape as having meaning. For example, I think of the circles as being in residential areas, squares as being in downtown business districts (where all the skyscrapers and office buildings are), triangles as being the industrial areas. But what about the "one of" shapes? Well, I assume the plus is the hospital, the diamond is the shopping mall, the pizza slice is the ball park, the pentagon is maybe a military base, the star is the capitol, and the sideways square is the airport. Developers: what do you say?