Biomedical engineering applies engineering principles and technologies to medicine. It focuses on designing medical equipment, prosthetics, devices for diagnosis and therapy. The discipline uses electrical and electronic engineering to build biomedical devices and design prosthetics and orthotics. Biomedical engineering has provided many advances in medicine over the years, from improving hospital equipment to creating prosthetics that allow people who have lost body parts to be mobile again. The curriculum for biomedical engineering students may be changed by adding courses in rehabilitation engineering and clinical engineering to provide a better education and allow students to work in these fields to develop technologies that help disabled people.