O visas are reserved for people with an extraordinary ability or achievement, their assistants, and any dependent, close family members. The extraordinary achievement or ability can be in sciences, arts, education, business, athletics, or in the fields of movies or television. The qualifying applicant must have proof of their ability or achievement and must be staying in the United States temporarily (less than 3 years) for the purpose of conducting work in their field. There are many criteria and steps in the application process for the O visa that must be completed. O visas may be renewed indefinitely.