F-1-Visa (Students)
This is the standard visa that is issued to individuals who wish to study in the United States. It is valid for the duration of your status as a student and for the period of your studies. This visa carries restrictions in terms of your ability to work off-campus. It is issued with the understanding that you may take only on-campus employment. You may apply for this visa only upon proof of admission to an accredited school or university in the U.S. There is a similar visa category- M-1-intended for those attending a technical or trade school.

J-1-Visa (Exchange Students or Trainees)
This visa is issued to participants of exchange programs, corporate on-the-job trainees as well as au-pairs. It is also suitable for academic and institutional researchers. You may not apply for this visa on your own. A approved U.S.-based organization must apply for the visa on behalf of the interested party.