California has more people than any other state in the United States. If California was a separate country, it would have the sixth largest economy in the world. California is probably the state with the most ethnic groups. It also has many different geographic features – mountains, deserts, and coasts. It is often called "The Golden State". The state flower is the golden poppy. The post office uses "CA" as a shorthand for California, and the Associated Press uses "Calif." or "Cali."