The AT&T logo. Its a great play on how the company is supposed to be able to support its customers anywhere and everywhere. So you can see how the sphere shape is connected to an idea of world-wide connection. Again, this logo is very simple and known to many Americans. However, I’m not sure how great they have been at accomplishing the goal of have that world-wide connection because I’ve heard that many out side of the US don’t know who they are. Nevertheless, this logo stands out to me and works very well.