Click here to purchase the entire book in PDF format. Other systems The Système International is pretty widely used, particularly in the scientific community around the world. There have been some incidents caused by conflict with other systems, however. Take for example, do an Internet search for the ``Gimli Glider'' and you'll find an amazing story about a 767 that ran out of fuel in mid-flight because the people that did the re-fueling in Montreal confused kg with pounds. Or the 1983 Black Sabbath ``Born Again'' tour where the band had to squeeze themselves onto a stage with a massive model of Stonehenge because the people that designed the set through in feet and the people who built the set thought in metres.