The Oakland Raiders of the National Football League also play there. The Golden State Warriors of the National Basketball Association play in the Coliseum's arena. Oakland is one of the world's busiest ports for container ships. These ships carry heavy cargo packed in metal containers of standard sizes to reduce shipping space. The western terminals of several freight railroad systems are located in Oakland.
Passenger trains link Oakland with other cities in the United States.
Air travelers use Oakland International Airport. The city is a commercial center. About 25 percent of its workers are employed in wholesale and retail trade, more than in any other economic activity. Oakland has about 750 factories, which employ about a fifth of the city's workers. The chief industries, in order of importance, produce processed foods, printed materials, fabricated metal products, and electrical machinery.