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In 1979, for example, Microsoft gave Boeing Commercial Airplane Co. the right to buy any Microsoft product for $50 per copy, until the end of time. Today most Microsoft applications sell in the $300 to $500 range, ten years from now they may cost thousands each.
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Robert X. Cringely (Accidental Empires: How the Boys of Silicon Valley Make Their Millions, Battle Foreign Competition, and Still Can't Get a Date)