From Scientific American:

In 1999 a technology manager called Kevin Ashton coined the phrase “The Internet of Things.” It was to convey the fact that not everything connected to the Internet generates data via humans tapping on keyboards. Today, these “things” now include elements of our critical national infrastructure via what are called SCADA (Supervisory Control And Data Acquisition) systems or ICS (Industrial Control Systems). Unfortunately, these systems can be just as vulnerable to attack as our laptops. Security through obscurity has helped to protect these systems until recently as they are not obvious to regular Internet users. However, there is no longer anywhere to hide.