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Glossary » human-machine interface

human-machine interface

HMI or MMI (man-machine interface); the portion of an electro-mechanical system that a person interacts with, used most often to refer to hardware as opposed to software interfaces. The HMI is the collection of knobs, levers, and monitors that a technician would use on an industrial system or the keyboard and mouse on a desktop computer.

The term is essentially equivalent to “human-computer interaction”, except that it is used more often to refer to hardware, while HCI is used most often to refer to software.