The city is often referred to as the capital of South Eastern USA. The metro area is occupied by close to 6 million people. It is the 9th largest city in the US.
Atlanta is considered to be a top business city and is a primary transportation hub of the Southeastern United States—via highway, railroad, and air. Metro Atlanta contains the world headquarters of corporations such as The Coca-Cola Company, The Home Depot, AT&T Mobility, UPS, Delta Air Lines, and Turner Broadcasting. Atlanta has the country's fourth-largest concentration of Fortune 500 companies, helping Atlanta realize a gross metropolitan product of US$270 billion, accounting for more than two-thirds of Georgia's economy. Hartsfield–Jackson Atlanta International Airport has been the world's busiest airport since 1998.
Atlanta is also a major university city with campuses for Georgia Institute of Technology and Emory University. Georgia Tech is the largest engineering school in the US and consistently ranked as the 3rd or 4th best engineering school in the US.