Ergonomics is the study of how equipment and furniture can be arranged in order that people can do work or other activities more efficiently and comfortably (according to Google). In the photos above, the technician on the left is sitting improperly and is likely going to have back and neck pain as a result. Her set-up is not ergnomically advisable. On the right, she sits properly, with a straight back, feet fully on the floor for balance and support.