IoT is a recent communication technology that connects all objects to the internet through appropriate sensing devices. This technology is build-up by linking it with wireless sensor networks and cloud computing technologies. Keeping this in viewpoint, different systems are developed to measure the various parameters in real-time along Texas Instruments CC3200 on-chip Wi-Fi controller in health care and environmental domains. The entire book is divided into 5 chapters. Chapter 1 is Introductory. It deals with an introduction to IoT, Wireless Sensor Networks, cloud computing. Chapter 2 covers the literature review on the Internet of Things, Wireless Sensor Networks, and IoT in the fields of Health care, Environment, Automobiles, and water management. Chapter 3 provides the details of the design and development of hardware. Chapter 4 presents the development of software using Energia IDE and the program listing is also included. Results and discussions are discussed in Chapter 5.