Apple now worth 623.5 Billion dollars

Amazingly enough Apple is now worth 623.5 Billion dollars. This only really rings into one's mind what this means when we compare Exxon, Microsoft, Google and amazon.
                                ExxonMobil            400    Billion Dollars
                                Microsoft                 250    Billion Dollars
                                Google                     210    Billion Dollars
                                 amazon.com            100    Billion Dollars

If you look at this you can see why so many companies now are trying to copy whatever Apple has been doing right worldwide. Because it is the most profitable company in the U.S. if not the world.