I lived in Silicon Valley, where everybody uses the computer, it's a vital tool for many different occupations. However, long periods of working at a computer can increase the chance of developing an injury. so, at the end of the session, I'll teach you the right way to sit at your desk to avoid discomfort. Muscle and joint pain of the upper limbs and eyestrain are results from inappropriate computer use. The risks can be reduced or eliminated with proper a work space design, improved posture and good working habits.