Approximately 140,000 immigrant visas are available each fiscal year for aliens (and their spouses and children) who seek to immigrate based on their job skills. If you have the right combination of skills, education, and/or work experience and are otherwise eligible, you may be able to live permanently in the United States. The five employment-based immigrant visa preferences (categories) are listed below.

Permanent Worker Visa Preference Categories

First Preference EB-1
This preference is reserved for persons of extraordinary ability in the sciences, arts, education, business, or athletics; outstanding professors or researchers; and multinational executives and managers.  
  
Second Preference EB-2
This preference is reserved for persons who are members of the professions holding advanced degrees or for persons with exceptional ability in the arts, sciences, or business.

Third Preference EB-3
This preference is reserved for professionals, skilled workers, and other workers. (See Third Preference EB-3 link on left for further definition of these job classifications.)
 
Fourth Preference EB-4
This preference is reserved for "special immigrants," which includes certain religious workers, employees of U.S. foreign service posts, retired employees of international organizations, alien minors who are wards of courts in the United States, and other classes of aliens. 
 
Fifth Preference EB-5
This preference is reserved for business investors who invest $1 million or $500,000 (if the investment is made in a targeted employment area) in a new commercial enterprise that employs at least 10 full-time U.S. workers.