A B visa is one of a category of non-immigrant visas issued by the United States government to foreign citizens seeking entry for a temporary period. The two types of B visa are the B-1 visa, issued to those seeking entry for business purposes, and the B-2 visa, issued to those seeking entry for tourism or other non-business purposes. In practice, the two visa categories are usually combined together and issued as a "B-1/B-2 visa" valid for a temporary visit for either business or pleasure, or a combination of the two. Visitors from some countries do not need to obtain a visa for these purposes (see United States visas).