A system of measurement used by most of the world and propagated by pompous and pathetic Europeans/Asians/etc. who lack understanding of mathematics.While you will find most socialist, war-losing Europeans talking about how the metric system is too hard for Americans to understand, is funny because the metric system is in place because of EASE OF USE. The imperial system of measurement is far more difficult and requires more thorough knowledge. That 12 inches are in 1 foot, 5280 feet in 1 mile. While the rest of the world was too idiotic to comprehend that, they developed a system of 10s to help them feel better about losing wars.The imperial system has a main divisor of 2, while the metric system has a base of 10. The metric system can not be visualized in any way, while any person can say that something is an inch, a foot or even a mile at the slightest glance.The metric system was the reason for the Mars climate orbiter crash of 1999, which goes to show, it's not exactly as incredible as the surrender monkeys on the other side of the earth wish it was.