and technology firm headquartered in Oakbrook Terrace Devry University, an international technical college headquartered in Downers Grove Dover Corporation, a manufacturer of specialized industrial products and equipment headquartered in Downers Grove Eby-Brown, a wholesale distributor headquartered in Naperville Exelon, a Fortune 100 energy company, has its Exelon Nuclear headquarters in Warrenville and offices for ComEd in Oakbrook Terrace Farm Progress, an agricultural publication publisher headquartered in St. Charles FGI Universal LLC, the largest frozen produce importer in the USA in Naperville First Alert, a safety products company headquartered in Aurora Hyundai, a motor vehicle company with regional offices in Aurora Joint Commission, health institution or program accreditation agency headquartered in Oakbrook Terrace MetLife, an insurance company with offices in Aurora Microsoft a computer technology company with offices in Downers Grove Mitutoyo, a company specializing in measuring instruments and metrological technology with U.S. headquarters in Aurora Molex, an electronic components manufacturer headquartered in Lisle Nalco, a water treatment and chemical company headquartered in Naperville Navistar, an automotive manufacturer headquartered in Lisle Nicor, a gas utility company headquartered in Naperville Nissan Motors, an automotive manufacturer with offices in Aurora and Naperville Nokia, an international telecommunications company, with offices in Naperville and Lisle. Oberweis Dairy, a dairy products company headquartered in North Aurora Portillo's Restaurants, a restaurant chain headquartered in Oakbrook Terrace Redbox a media rental company headquartered in Oakbrook Terrace Sanford L.P., a writing products manufacturer headquartered in Oak Brook SAP America, the Americas' subsidiary of SAP AG, the world's largest business software company with offices in Downers Grove. Sara Lee, a food company headquartered in Downers Grove Smithfield Foods, a meat products manufacturer with subsidiary Armour-Eckrich Meats headquartered in Lisle and a processing facility in St. Charles Sunshine Biscuits, a cracker, cookie, and cereal manufacturer headquartered in Elmhurst Tellabs, a telecommunications company headquartered in Naperville Toyota Motor Sales, U.S.A., Inc., an automobile manufacturer with regional offices in Aurora and Naperville VVF, a personal care products manufacturer with a plant in Montgomery Westell, a modems manufacturer headquartered in Aurora Higher education institutions Aurora University is a private liberal arts college located in Aurora Benedictine University a private university located in Lisle The College of DuPage is a community college that primarily serves DuPage County, located in Glen Ellyn DeVry University, headquartered in Oakbrook Terrace, offers numerous technical degrees at its eight Chicago area campuses. Elmhurst College is a private liberal arts college