The convergence of Internet of Things (IoT), Artificial Intelligence (AI), and Data Science (DS) is revolutionizing the way we interact with technology and the world around us, playing a critical role in advancing SDG 3. IoT enables the seamless integration of physical devices into the digital world, creating a network of interconnected objects that communicate and collaborate to perform tasks and gather vital health data. AI brings the power of machine learning and intelligent decision-making to this network, allowing systems to learn from data, adapt to new information, and automate complex processes, such as personalized treatment plans and predictive health monitoring. Data Science, on the other hand, provides the methodologies and tools necessary to analyze and derive actionable insights from the vast amounts of health-related data generated by IoT devices. Together, these three disciplines form the backbone of modern technological innovation, driving advancements in healthcare and well-being. In this chapter, we will explore the foundational concepts of IoT, AI, and DS for offering background knowledge to the readers.