Liechtenstein is tiny in size and has very limited natural resources, but it is nevertheless a prosperous country with a highly industrialized market economy and a robust financial services sector. Liechtenstein enjoys highest per capita income in the world. The Liechtenstein economy is widely diversified with a large number of small businesses. Liechtensteins modern manufacturing industries have developed recently; notably in precision instruments, dental and optic materials, pharmaceuticals, and electronics. Tourism, banking, the sale of postage stamps and other retail services, and from office maintenance cost for international headquarters are also important source of income for the country.