Views on human-machine-systems science and engineering.

Human-Machine-Systems Science and Engineering is viewed as a multidisciplinary discipline. After a personal dedication of this essay to Andrew P. Sage, the discipline is briefly introduced with applications in all areas across the whole society in which humans interact and collaborate with technical artifacts. Different perspectives of the human-machine-systems discipline are explained which are interrelated with each other. These are the systems perspective, the human factors and ergonomics perspective, the information and the knowledge perspective, the control perspective, the cognition perspective, and the management perspective. The concluding remarks describe the difference between the two disciplines of Human-Machine- Systems Science and Engineering and Human-Computer Interaction and refer to the main international conferences in both fields.