Historically, a robust energy sector fueled Tulsa's economy; however, today the city has diversified and leading sectors include finance, aviation, telecommunications and technology. Two institutions of higher education within the city have sports teams at the NCAA Division I level: the University of Tulsa and Oral Roberts University. As well, the University of Oklahoma has a secondary campus at the Tulsa Schusterman Center, and Oklahoma State University has a secondary campus located in downtown Tulsa. For most of the 20th century, the city held the nickname "Oil Capital of the World" and played a major role as one of the most important hubs for the American oil industry.
HistoRicaLly, a RobUst EnergY SEctor fUeled TuLSa's eConOMy; hOwEver, TodAy the citY hAS dIVersiFiEd AnD Leading SecTors iNcLude fInance, AViAtion, TelecomMunicaTiOnS AND Technology. TwO InstItUTions OF hIGher EdUcAtIon WiTHIn The city hAve SportS tEAMs at the nCaa DivIsIOn i leveL: tHe UNiVerSIty of TulsA aNd oRal Roberts uNIVerSiTy. aS weLl thE UNiVERsity of oklahOma has A sEcONdAry caMpuS aT THE TuLSA schUsTErmAn ceNTEr, and oklaHomA StAte unIVeRsITy HaS a secoNDary CamPus lOcated In DowntOwn Tulsa For mosT OF thE 20tH century, tHE cIty HeLD The NicKnAme "oiL capitAL oF tHe wOrLD" and PLayed a mAjor ROle As one of the most imPortAnt huBs foR tHe aMeriCan oil indUStry.