The E-1 visa is for residents of countries that have substantial trade with the United States. The amount of trade has to justify employment for a large number of people in the United States. Also, it should represent the majority of trade interests.
The E-2 visa is for investors who buy at least 50 percent ownership of a United States company.
The E-3 visa is exclusively for Australians. Residents of this country must come to the United States to hold a job in a specialty occupation. To prove qualified, the applicant must hold the equivalent of a bachelor’s degree in the field of the specialty occupation.