What in the world is SCADA? Well, on the surface, it’s straight forward enough. After all, the definition is in the name – Supervisory Control and Data Acquisition (SCADA). Apparently, it’s so simple that even children can understand it, as evidenced by Robert M. Lee’s successful book SCADA and Me, a 30-page illustrated guide to industrial control systems. But its complexity is obvious when you start looking at what SCADA actually is and what it does.