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.
What is whooping cough? Whooping cough (pertussis) is a disease that causes very severe coughing that may last for months. During bursts of violent coughing, you may make a noise that sounds like a whoop when you try to take a breath. You can cough so hard that you hurt a rib. Whooping cough spreads easily from one person to another.