The internet of things (IoT) refers to the network of physical devices, vehicles, and other objects that are connected to the internet and can collect and exchange data. IoT is used in many applications, such as smart homes, smart cities, and industrial automation. Popular IoT platforms include AWS IoT, Google Cloud IoT, and Microsoft Azure IoT. See our pricing A transistor is a semiconductor device that can amplify or switch electronic signals. It is composed of a semiconductor material, usually silicon, and is widely used in modern electronic devices.