The fact that the computer is not safe, before others felt in the most computerized country in the world - the United States. The epidemic of "white collar" covered the U.S., damaging the health of many people. According to the Ministry of Labor, there are only so-called "recurring traumatic impact with a computer" (PTVRK) cost of corporate America at 100 billion dollars annually. Compensation paid to employees are reaching astronomical size, but some affected by the work of the machine had to pay severe pain throughout their lives. But what causes that lead to such serious problems associated with the constant use of computer?