What is a Human Machine Interface (HMI), and how do you use it?

"Human machine interface, or HMI, refers to how people interact with technology and the benefits they obtain from using it. Naturally, this involves input devices such as keyboards and mice and output devices such as monitors, audio systems, and printers. However, HMI extends beyond just the user interface and includes how the technology communicates with other technologies, the operating systems and programming it runs on, the specific types of hardware and networking used, how the databases are constructed, and how the information is presented to the user, in forms, reports, and using other present presentation techniques."