The features and how they can work best for an application are what make one system preferred over another. Min has several patents in ATM switching, with several others pending. In addition to ATM switching, Min and Hegde have made major contributions to mobile communications systems, such as cellular phones. Min and Hegde bid successfully against numerous entries worldwide for the technical portion of the South Korean PCS, which is the international standard for mobile communications systems. We use mathematical reasoning to understand the dynamics of large-scale systems.
Telecommunications networks are by far the largest man-made system ever created.