Visitor visas are NIVs for people who wish to enter the United States for business or tourism, or a combination of the two. The B-1 visa is for business. For tourism, the appropriate form is B-2. Often, the B-1 and B-2 visas are combined and issued as one visa: the B-1/B-2. If you are from a country that has access to the ESTA system the corresponding classifications are “WB” (for waiver business) and “WT” (for waiver tourist)