Yes, Forbes Magazine stated that three of Oklahoma energy corporations are the largest oil companies in the nation. 
 Are there any other interesting facts about culture or Etymology? 
 Interesting. Do you have any facts for me about Economy? 
 Can I get more facts about culture, please? 
 Sorry, I don't have that information. But I can tell you about Oklahoma's education system. The state has largest public institutions of higher education, operating thru one primary campus and satellite campuses throughout the state.
Yes, Forbes Magazine stated that three of Oklahoma energy corporations are the largest oil companies in the nation.