Rich in terms of what? Revenue? Profit? Market cap? Assets?
ExxonMobil may be the "biggest" company in the world right now. In terms of the richest company ever, accounting for inflation and stuff... maybe Standard Oil? East India Trading Company?
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Yoblazer: http://i32.tinypic.com/zlf1w7.gif
Watch and you'll see... someday I'll be... part of your world!