The AMA established a guide for the rating of physical impairment of the various organ systems which provides clinically sound and reproducible criteria for rating permanent impairment. Contents include- impairment evaluation; records and reports; the musculoskeletal system; the nervous system; the respiratory system; the cardiovascular system; the hematopoietic system; the visual system; ear, nose, throat, and related structures; the digestive system; the urinary and reproductive systems; the endocrine system; the skin; mental and behavioral disorders; pain.

Backpacker brings the outdoors straight to the reader's doorstep, inspiring and enabling them to go more places and enjoy nature more often. The authority on active adventure, Backpacker is the world's first GPS-enabled magazine, and the only magazine whose editors personally test the hiking trails, camping gear, and survival tips they publish. Backpacker's Editors' Choice Awards, an industry honor recognizing design, feature and product innovation, has become the gold standard against which all other outdoor-industry awards are measured.

The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.