Multiple Sclerosis: Causes, Symptoms and Treatments. Multiple sclerosis, also known as MS, is a chronic disease that attacks the central nervous system, i.e. the brain, spinal cord and optic nerves. In severe cases, the patient becomes paralyzed or blind while in milder cases there may be numbness in the limbs. Over 350,000 people have MS in the US.
Devices you think of as input-only, such as a keyboard, might also be an output device (keyboard status LEDs). Conversely, devices you think of as output-only might also serve as input devices (paper/toner/ink status messages back to the computer).
Output device that takes the text and images displaying on a computer screen and projects them on a larger screen so an audience can see the image clearly. display device Output device that visually conveys text, graphics, and video information.