Individuals planning to travel to the U.S. for a different reason such as students, temporary workers, crewmen, journalists, etc., must apply for a different visa that is appropriate for their specific category. If an individual is planning to come to the United States for a course of study that is 18 hours or more a week and credited towards a degree, then they will need a student visa. Also, when one intends to travel to the U.S. to attend seminars or conferences to obtain credit towards a degree, then they too will need a student visa.