HAL (Hybrid Assistive Limb) has been released for rental in Japan for $2,200 a month. This system, which assists those temporarily or permanently disabled people to walk upright without crutches, has progressed a lot over the years. The robotic legs listens to nerve signals from the brain and mimics the intended movements. CYBERDYNE, a new company formed to mass-produce these robotic legs, insists that their robot will only be used to help people and have refused all military-related offers for their product.