Forms of Tourism

The United Nations classified three forms of tourism in 1994 in its Recommendations on Tourism Statistics: Domestic tourism, which involves residents of the given country traveling only within a country; Inbound tourism, involving non-residents traveling in the given country; and Outbound tourism, involving residents traveling in another country.
The UN also derived different categories of tourism by combining the 3 basic forms of tourism: Internal tourism, which comprises domestic tourism and inbound tourism;National tourism, which comprises domestic tourism and outbound tourism; and International tourism, which consists of inbound tourism and outbound tourism.
Adapted from wikipedia