Dewey Decimal Classification - Children's Encyclopedia (Ages 8-11) The Dewey Decimal Classification (DDC) is a system for organizing the contents of a library. It is commonly known as the Dewey Decimal System. It helps people find nonfiction books on any subject in the library.
Beijing â The Capital of China. Urban Population: 18.8 million. As the capital of China, Beijing ranks as the top on the major cities in China. Reputed as the worldâs historical city and one of the top seven ancient capitals in China, Beijing has been the capital of China since Lioa Dynasty, 800 years till now.
The largest city in the world by population is Tokyo, Japan, with a population of 38,001,000. Tokyo is followed by Delhi, India (population 25,703,168) and Shanghai, China (population 23,740,778). The following is a list of the world's 150 largest metropolitan areas, which generally includes an urban area and its surrounding suburbs.