The uses of mobility aids are critical to the lives of millions of people around the world with mobility impairments. Mobility aids, whether it is a wheelchair, a walker, or a prosthetic limb, give their users the independence in their everyday lives to work, play, and perform their activities of daily living. Properly prescribed mobility aids also assist in the safety of their users by reducing falls, and reducing fatigue and injuries to the upper extremities. The dramatic advancements in technology in the past decades have allowed mobility aids to be accessible to a far greater population of users, and have given users, even those with very limited functional mobility, the means to participate in whichever activities they please and also to perform their normal daily activities.