Land management of these areas focuses on conservation, timber harvesting, livestock grazing, watershed protection, wildlife, and recreation. Unlike national parks and other federal lands managed by the National Park Service, extraction of natural resources from national forests is permitted, and in many cases encouraged. Forest products are the resources removed and harvested from national forests. They may be for commercial or personal use such as “lumber, paper, and firewood as well as 'special forest products' such as medicinal herbs, fungi, edible fruits and nuts, and other natural products”. However, the first-designated wilderness areas, and some of the largest, are on national forest lands.