In the 21st century, Allegheny County and Greater Pittsburgh have undergone a dramatic transformation from an industrial stronghold to a high-tech hub with a robust economy and an enviable quality of life. The region, once renowned for its steel mills, is now a leader in ground-breaking research and innovative technology. Unprecedented collaboration between the public and private sectors has put the region at the forefront of health care and life sciences, information and communications technology, financial and business services, and advanced manufacturing.