The Internet of Things (IoT) is a paradigm where objects equipped with sensors, actuators, and processors communicate to serve a meaningful purpose. This survey paper presents a novel taxonomy for IoT technologies, highlights key technologies, and profiles applications that can significantly improve human life, especially for the differently abled and elderly. It is more comprehensive than previous surveys, covering most major technologies from sensors to applications. The IoT architecture is not universally agreed upon, with various proposals including three-layer and five-layer models. The three-layer model includes the perception, network, and application layers, while the five-layer model adds processing and business layers. Fog computing, which brings computation closer to the data source, and cloud computing, which provides scalability and flexibility, are also discussed. Social IoT (SIoT) is a new paradigm where social relationships between objects are considered similar to human relationships, enabling navigation, trustworthiness, and social network analysis. Sensors are essential for data collection, with various types such as smartphones, medical sensors, neural sensors, environmental sensors, and RFID tags. Actuators are used to effect changes in the environment, such as controlling temperature or lighting. Preprocessing of data is crucial due to resource constraints, and fog computing is used to handle this efficiently. Communication in IoT involves various protocols and standards, including RFID, NFC, Bluetooth, Zigbee, WiFi, and 6LoWPAN. These technologies are used for low power, short range, and long range communication. The IoT network protocol stack includes physical and MAC layers, adaptation layers, and transport layers, with 6LoWPAN being a popular standard for wireless communication. The survey discusses various applications of IoT in healthcare, fitness, education, entertainment, energy conservation, environment monitoring, home automation, and transport systems. It emphasizes the importance of IoT in reducing human effort and improving quality of life. The paper also highlights the challenges in data collection, communication, and processing, and the need for standardization and middleware to manage heterogeneous components.The Internet of Things (IoT) is a paradigm where objects equipped with sensors, actuators, and processors communicate to serve a meaningful purpose. This survey paper presents a novel taxonomy for IoT technologies, highlights key technologies, and profiles applications that can significantly improve human life, especially for the differently abled and elderly. It is more comprehensive than previous surveys, covering most major technologies from sensors to applications. The IoT architecture is not universally agreed upon, with various proposals including three-layer and five-layer models. The three-layer model includes the perception, network, and application layers, while the five-layer model adds processing and business layers. Fog computing, which brings computation closer to the data source, and cloud computing, which provides scalability and flexibility, are also discussed. Social IoT (SIoT) is a new paradigm where social relationships between objects are considered similar to human relationships, enabling navigation, trustworthiness, and social network analysis. Sensors are essential for data collection, with various types such as smartphones, medical sensors, neural sensors, environmental sensors, and RFID tags. Actuators are used to effect changes in the environment, such as controlling temperature or lighting. Preprocessing of data is crucial due to resource constraints, and fog computing is used to handle this efficiently. Communication in IoT involves various protocols and standards, including RFID, NFC, Bluetooth, Zigbee, WiFi, and 6LoWPAN. These technologies are used for low power, short range, and long range communication. The IoT network protocol stack includes physical and MAC layers, adaptation layers, and transport layers, with 6LoWPAN being a popular standard for wireless communication. The survey discusses various applications of IoT in healthcare, fitness, education, entertainment, energy conservation, environment monitoring, home automation, and transport systems. It emphasizes the importance of IoT in reducing human effort and improving quality of life. The paper also highlights the challenges in data collection, communication, and processing, and the need for standardization and middleware to manage heterogeneous components.