For more than a century, the Dow Jones Industrial Average (DJINDICES: ^DJI) has been the most-watched stock market index around the world. And despite the Dow's glaring flaw of being price-weighted, rather than market-cap-weighted, it retains its allure on Wall Street thanks to its rich history.It's also index that's filled with 30 multinational juggernauts from an assortment of industries.