Karachi is the largest city, main seaport and the financial capital of Pakistan, and the capital of the province of Sindh. It is the 20th largest city of the world, in terms of metropolitan population and is Pakistan’s premier centre of banking, industry, and trade. Karachi is also home to Pakistan’s largest corporations, including those that are involved in textiles, shipping, automotive industry, entertainment, the arts, fashion, advertising, publishing, software development and medical research. The city is also a major hub of higher education in South Asia and the wider Islamic World. Karachi has been ranked as a Beta world city, as of 2008.