HMI is an abbreviation for Human Machine Interface.
The term HMI (Human Machine Interface) is used to declare the the process of human interaction with a machine.
The main goal of HMI is human control over a machine. Next to the control and operation of the hardware, the interface also provides feedback on status and behaviour of the machine.
Human Machine Interfaces nowadays, are seen on all kind appliances and hardware. Examples go from heavy machinery to computer operating systems.