IoT Killer Applications Design Rule 1: Interoperable Networking of the IoT Devices IoT Killer Applications Design Rule 2: Best IoT Sensor Selection for Collecting Characteristic Information of the Environment IoT Killer Applications Design Rule 3: Semantic Reasoning of the Data from the IoT Devices IoT Killer Applications Design Rule 4: Collective Interaction of the IoT Devices IoT Killer Applications Design Rule 5: Best UI Selection for Users IoT Killer Applications Design Rule 6: Adaptable Autonomous System for Users IoT Killer Applications Design Rule 7: Maximum Exploitation of Back-End Systems (Cloud, Big Data Analytics) IoT Killer Applications Design Rule 8: Security Architectures for Maximum Security Measures IoT Killer Applications Design Rule 9: Exploration of Cross-Industry Applications IoT Killer Applications Design Rule 10: User Experiences (UXs) for Maximum User Satisfaction