Columbus is home to the Battelle Memorial Institute , the world 's largest private research and development foundation . ; Chemical Abstracts Service , the world 's largest clearinghouse of chemical information ; NetJets , the world 's largest fractional ownership jet aircraft fleet ; and The Ohio State University , one of the largest universities in the United States .
It has the world 's largest private research and development foundation , the Battelle Memorial Institute ; CAS , or Chemical Abstracts Service , the world 's largest clearinghouse of chemical information ; NetJets , the world 's largest fractional ownership jet aircraft fleet ; and The Ohio State University , the nation 's largest campus .