The United States of America is a country located in North America.

The chief of state is the highest-ranking official in a country.

Athens was a prominent city-state in ancient Greece.

The client state relies heavily on the major power.

Switzerland has long been considered a buffer state between France and Germany.

The secretary of state is responsible for overseeing foreign policy.

The Civil War was fought to end the existence of slave states in the United States.

Solid-state drives are faster and more reliable than traditional hard drives.

The welfare state provides social support and assistance to its citizens.

This new smartphone features state of the art technology.