IEEE Spectrum has a special feature article on exoskeletons. They cover a range of current prototype exoskeletons including the Linux-controlled HAL unit from Japan which is scheduled to hit the market by 2006, making it the first commercially available exoskeleton. They provide a list of exoskeleton projects in the US, Asian projects, and European projects. The Japanese and European units are primarily targeted at medical rehabilitation or assistance and allowing medical technicians to lift patients safely. While some US exoskeletons have medical applications, most are being developed as part of DARPA's human augmentation program for military applications such loading bombs or carrying combat equipment. A photo gallery showing some of the exoskeletons mentioned is also provided.