It's the largest city in the largest county in the nation. San Bernardino is the seat of government for the vast inland California county. San Bernardino's economy is mostly based on service and retail businesses, although it is also a commercial transportation hub for both rail and air transport. License-wise, San Bernardino makes doing business easy. Minimal city licensing combines with relatively light county licensing to make it one of the less regulated zones in California. However, heavy state regulation still applies.