Touchscreen Interfaces

An HMI, or Human-Machine Interface, is a device or software that lets users communicate with a machine or automation system. Besides translating complex data into useable information, an HMI relays the user’s commands.

By providing information, alerts, commands and other tools, an HMI connects the user with the process being controlled. So the more adapted the tools are to the user, the more appropriately he or she can react.

An intuitive, user-friendly HMI can make the difference between an inefficient system and a cost-effective one.
(source : http://www.automationcontrols.com/touchscreen-interfaces)