Pittsburgh is located at the confluence of the Monongahela and Allegheny Rivers, which merge to form the Ohio River. Traditionally an industrial powerhouse dominated by the steel industry, Pittsburgh has reinvented itself as a diversified economy spanning health and educational services, banking, high tech manufacturing, tourism, and many industries in between. The Pittsburgh Metropolitan Statistical Area (MSA) is comprised of seven counties that surround the City of Pittsburgh: Allegheny, Armstrong, Beaver, Butler, Fayette, Washington, and Westmoreland Counties.