Know how to use "fewer" and "less"? Find out.
ergonomics er·go·nom·ics (ûr'gə-nŏm'ĭks)
The applied science of equipment design, as for the workplace, intended to maximize productivity by reducing operator fatigue and discomfort.
The technology concerned with the design, manufacture, and arrangement of products and environments to be safe, healthy, and comfortable for human beings.
Note: The term is most often encountered in discussions of the design of furniture, tools, and other things built to be used by humans.