Prior to 1938, Saudi Arabia was not considered an oil-rich nation. Today, the oil industry dominates its economy, making up 90 percent of all Saudi exports. Oil was first discovered there in the mid-1930s by the US-owned Arabian Standard Oil Company, which became the Arabian American Oil Company. However, it was not until 1938 that a commercially viable oil field was found, yielding one of the largest supplies in the world. How large are Saudi Arabia's oil reserves estimated to be? Discuss (http://forum.thefreedictionary.com/postst34315_Significant-Oil-Reservoirs-Discovered-in-Saudi-Arabia--1938-.aspx)
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