Agile development at Amazon.com, circa 1995
At launch, the site wasn’t even truly finished. Mr. Bezos’s philosophy was to get to market quickly, in order to get a jump on the competition, and to fix problems and improve the site as people started using it. Among the early mistakes, according to Mr. Bezos: “We found that customers could order a negative quantity of books! And we would credit their credit card with the price and, I assume, wait around for them to ship the books.”
From “Jeff Bezos of Amazon.com: Birth of a Salesman”, The Wall Street Journal, 15 October 2011