Santa Ana is the most populous city in Orange County, California. The city's economy includes aerospace, food service, electronics, communication, healthcare and online education. Like most cities in California, Santa Ana regulates a number of businesses that can mask vice crimes such as massage and nightclubs. However, much of the regulations small businesses face occurs at the county and state levels. Businesses in Santa Ana need business licenses and permits at city, county, state and federal levels. The combination of business licenses at each level of government can lead to highly regulated businesses such as food service, contracting, commercial transportation and healthcare may need up to ten business licenses and permits.