IIoT stands for the Industrial Internet of Things or Industrial IoT that initially mainly referred to an industrial framework whereby a large number of devices or machines are connected and synchronized through the use of software tools and third platform technologies in a machine-to-machine and Internet of Things context, later an Industry 4.0 or Industrial Internet context.
IIoT is an important part of what is described as the Fourth Industrial Revolution. In a manufacturing environment, IIoT is also the key to the development in predictable maintenance, zero-failure vision and improved efficiency in maintenance and service, energy management and asset tracking.
Major industries include oil and gas, transportation, manufacturing, healthcare and energy, mining and metals, aviation but they are certainly not the only ones. Many use cases in government (smart cities) and agriculture, for instance, are also seen as IIoT.