There are many kinds of non-
immigrant visas through which one can come to the United States. Each is issued for a different purpose. One common factor for all non-immigrant visas is that they are issued for a temporary period. Non-immigrant visa holders have to leave the US when their status expires.
For more details please visit your nearest
immigration office or your local USCIS/
USIS office like for example
USCIS Vermont Service Center and get your
USCIS forms to begin your application.