Where is Chicago OTC?

Chicago OTC - Art Institute of Chicago Chicago OTC - British International School of Chicago Lincoln Park Chicago OTC - Elburn Chicago OTC - FAO Schwarz Chicago OTC - Field Museum of Natural History Chicago OTC - Illinois Institute of Technology Chicago OTC - Metro Chicago Chicago OTC - Museum of Science and Industry Chicago OTC - Naval Station Great Lakes Chicago OTC - Six Flags Great America Chicago OTC - UIC-Halsted Blue Line Station Chicago OTC - Wheaton Chicago OTC - Hammond Chicago OTC - Arlington Heights Chicago OTC - Harvard