Who discovered DNA? Who invented the automatic teller machine? Is there such a thing as a magnetic-levitated train? These are just a few of the questions readers can quickly answer by consulting Milestones in Science and Technology. Readers of all ages can easily find facts, history, names, and dates surrounding the 1,250 most important events in sci-tech history. Each event gets special treatment in understandable paragraphs of 150 to 600 words. Four indexes provide access by year, name of discoverer or inventor, nationality or country, and broad subject category. The text is enhanced by photos and illustrations.