In which of the following categories do smart devices belong?

While some smart devices are also appliances (e.g., smart refrigerators), 'appliances' is a broader category that includes non-smart devices, and not all smart devices are appliances.

Many smart devices are multifunction, but 'multifunction devices' is a description of capability, not a primary category for smart, connected devices that leverage network connectivity.

Smart devices are characterized by their ability to connect to the internet, collect and exchange data, and often operate autonomously or be controlled remotely, which are the defining features of Internet of Things (IoT) devices. This category encompasses a wide range of interconnected physical objects.

Some smart devices are mobile (e.g., smartwatches), but many are stationary (e.g., smart thermostats or smart speakers), so 'mobile devices' is not a comprehensive category for all smart devices.