Ergonomics is the branch of engineering science in which biological science is used to study the relation between workers and their environments
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Ergonomics is the science of designing the job, equipment, and workplace to fit the worker. Proper ergonomic design is necessary to prevent repetitive strain injuries, which can develop over time and can lead to long-term disability.
en.wikipedia.org/wiki/Ergonomics
The science of the design of equipment, especially so as to reduce operator fatigue, discomfort and injury
en.wiktionary.org/wiki/ergonomics
Occupational Safety and Health Administration (OSHA) provide suggestions for setting a computer workstation at the following site
http://www.osha.gov/SLTC/etools/computerworkstations/index.html