MS-DOS resulted from a request in 1981 by IBM for an operating system to use in its IBM PC range of personal computers. Microsoft quickly bought the rights to 86-DOS from Seattle Computer Products, and began work on modifying it to meet IBM's specification.
Complications from whooping cough can include weight loss, loss of bladder control, fainting, rib fractures from severe coughing, and pneumonia. A small percentage of adolescents and adults with whooping cough need to be hospitalized for their illness. In one study, 61% of adults with whooping cough missed work.
Diphtheria is an infection that causes a thick covering on the back of the throat. It can lead to breathing problems, heart failure, paralysis and death. Pertussis is an infection also known as whooping cough. It can cause severe coughing spells, vomiting and difficulty speaking and breathing. Up to 5 percent of adolescents and adults who have pertussis either experience complications or are hospitalized as a result of the illness.