The Democratic Republic of the Congo (DRC) is located in Central Africa. It was previously known as Zaire, but changed its name to the Democratic Republic of the Congo in 1997. The country shares borders with Angola, Zambia, Tanzania, Burundi, Rwanda, Uganda, South Sudan, and the Republic of the Congo. Synonyms for the DRC include Congo-Kinshasa, DR Congo, Congo-Leopoldville, and Zaire. The DRC is the second-largest country in Africa and has a population of over 89 million people. The country's official languages are French, Lingala, Swahili, and Tshiluba. The DRC is rich in natural resources, including diamonds, gold, copper, cobalt, and coltan.