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.
To do this, mechanical engineers research, design, develop, build and test various devices. Computers have changed the way mechanical engineers do their work. Computing tools now allow complex analyses to be performed in seconds that once required days or weeks of hand calculations, Sims writes.