Hostelling International (HI), formerly known as International Youth Hostel Federation (IYHF), is a federation of more than 70 National Youth Hostel Associations in more than 80 countries. HI has over 4,000 affiliated hostels around the world. Hostelling International is a non-governmental, not-for-profit organisation working with United Nations Educational, Scientific and Cultural Organisation UNESCO and the World Tourism Organisation UNWTO. HI has also been identified as the sixth largest provider of travel accommodations in the world.