Understanding of the activity of humans within systems or in an environment to maximise the wellbeing of humans and their productive use of those systems or environments. In Digital Technologies, ergonomics is concerned with physical, mental and emotional impacts on users of the technologies. For example, it is understood that many people may get sore eyes if they look at screens for too long, and that if computer keyboard users do not sit up straight with arms at right angles to the body, they may get repetitive strain injury in their forearms.