The Internet of Things (IoT) refers to the network of physical devices, vehicles, home appliances, and other items embedded with electronics, software, sensors, actuators, and connectivity which enables these objects to connect and exchange data.

To determine which one is not part of IoT, we need to consider the typical components and examples of IoT. Here are some common examples of IoT devices and systems:

1. Smart Home Devices: These include smart thermostats, smart lights, smart locks, and smart speakers like Amazon Echo or Google Home.
2. Wearable Technology: Devices like fitness trackers (e.g., Fitbit), smartwatches (e.g., Apple Watch), and medical devices that monitor health metrics.
3. Industrial IoT (IIoT): This includes machinery and equipment in manufacturing plants that are connected to the internet for monitoring and automation.
4. Connected Vehicles: Modern cars with internet connectivity, GPS, and various sensors that provide real-time data and enable features like autonomous driving.
5. Smart Cities: Infrastructure like smart streetlights, traffic management systems, and waste management systems that use IoT technology to improve efficiency.
6. Agricultural IoT: Sensors and devices used in farming to monitor soil conditions, weather, and crop health.
7. Healthcare IoT: Medical devices that monitor patients' health and send data to healthcare providers, such as remote monitoring systems and smart pill bottles.

Given these examples, something that is not part of IoT would be a device or system that does not connect to the internet or other devices to exchange data. For instance:

• Traditional Appliances: A regular refrigerator or washing machine without internet connectivity or smart features is not part of IoT.
• Non-connected Devices: Devices that operate independently without any form of connectivity, such as a basic digital watch or a manual thermostat, are not part of IoT.
• Standalone Computers: While computers are connected to the internet, they are generally not considered IoT devices unless they are part of a larger network of interconnected devices.

In summary, if an item does not have the capability to connect to the internet or other devices to exchange data, it is not part of the IoT ecosystem.