Anyone who turns on a television or radio or opens a major web portal like Yahoo or AOL knows about the Dow Jones Industrial Average (DJIA). Lately a lot of people probably know more about the Dow than they really want to. Few people, however, know what the Dow Jones average really means. The DJIA began in July of 1884 when the Dow Jones Publishing Company published its first average of U.S. stocks in what would become The Wall Street Journal. This was followed 12 years later with the publication...