Involvement of the lung causes shortness of breath or fatigue during physical activity. Many patients with scleroderma become less physically active because of musculoskeletal complaints or the fatiguing nature of the illness. Hence many will not be physically active enough to actually develop shortness of breath.
Computer hardware engineers research, design, develop, and test computer systems and components such as processors, circuit boards, memory devices, networks, and routers. These engineers discover new directions in computer hardware, which generate rapid advances in computer technology.
Computer hardware engineers usually work in research laboratories that build and test various types of computer models. Most work in high-tech manufacturing firms. Some work in computer systems design firms, research and development firms, or for the federal government. More than 95 percent of computer hardware engineers work in metropolitan areas.