&quot;I think there is a world market for maybe five computers.&quot;<p>Thomas Watson, president of IBM, 1943<p>&quot;Nuclear-powered vacuum cleaners will probably be a reality within ten years.&quot;<p>Alex Lewyt, president of Lewyt vacuum company, 1955<p>&quot;Two years from now, spam will be solved.&quot;<p>Bill Gates, founder of Microsoft, 2004