The document provides an overview of tourism, including definitions of key tourism terms, the economic impact of tourism, transportation systems that enable tourism, types of tourists, facilities that support tourism, and essential requirements for tourism. It defines tourism as temporary travel outside of one's normal place of residence for purposes other than daily commuting, and notes that international tourism receipts grew to over $944 billion in 2008. It also lists factors like time, money, motivation, and mobility as essential requirements enabling tourism.