An example of MS-DOS's command-line interface, this one showing that the current directory is the root of drive C. MS-DOS (/ËÉmÉsËdÉs/ EM-es-DOSS; acronym for Microsoft Disk Operating System) is a discontinued operating system for x86-based personal computers mostly developed by Microsoft.
Written by: Kierstan Boyd. Nov. 08, 2012. The main symptom of vitamin A deficiency is vision loss and blindness. Vision loss often begins as a problem adjusting to seeing in the dark, or night blindness. People with night blindness do not see well in the dark, but are able to see normally if enough light is present.
Signs of vitamin B6. deficiency include dermatitis (skin inflammation), glossitis (a sore tongue), depression, confusion, and convulsions [l,l2]. Vitamin 86 deficiency also can cause anemia [1,12,14]. Some of these symptoms can also, result from a variety of medical Conditions otherâ than. vitamin B6 deficiency. It is important to have a physician evaluate these symptomsso that. appropriate medical care can be given.