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101 Inventions That Changed the World in the Last 100 Years
first user-friendly one. Prior to the invention of the device in 1961, projectors mostly relied on mechanical parts to move the slides in sequence in front of the light source. At that time, the horizontal
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Top 100 Famous Inventions and Greatest Ideas of All Time
feature in 1975. It’s safe to say that the ignition system started the modernization movement from mechanical-control to electronic-control in the automobile industry. Today, most cars offer a lot of electric-controlled