What does the 'things' in Internet of Things refer to?

• A. Smart phones and tablets.
• B. Machines and vehicles that operate themselves
• C. A physical object with embedded electronics
• D. Cloud services and platforms

Answer: (C)

The things in Internet of Things are physical objects that carry embedded electronics—sensors, actuators, a microcontroller, and a wireless radio—so they can sense the environment, communicate data, and often be controlled remotely. This makes everyday objects smart by giving them connectivity and the ability to interact with other devices and systems over the internet. Think of a connected thermostat, a wearable health sensor, or a factory sensor on a machine—the common thread is that tangible object plus electronics enabling data exchange. The other options miss the point: smartphones and tablets are user devices, not the broad category of “things”; autonomous machines are examples of IoT outcomes but not the defining element; cloud services are the infrastructure, not the physical object itself.