Though the oil industry has historically dominated Tulsa's economy, efforts
in economic diversification have created a base in the sectors of aerospace,
finance, technology, telecommunications, high tech, and manufacturing. The
Tulsa International Airport (TUL) and the Tulsa Port of Catoosa, the nation's
most inland seaport, connect the region with international trade and
transportation. An American Airlines maintenance base at Tulsa International
Airport is the city's largest employer and the largest maintenance facility in
the world, serving as the airline's global maintenance and engineering
headquarters, while
