The Internet of Things (IoT) is:
(1) the set of all devices (but excluding traditional computer systems) which are connected to the Internet,
(2) the technology which enables advanced interconnectivity of ‘smart’ devices to the Internet and each other.
The scope of the IoT ranges from fridges that send messages to your smartphone when you run out of milk, to factory machines that can ‘talk’ to each other, follow instructions from computer systems, and run entire production process with virtually no human input.