Metric system
The metric system organizes units such as the metre and kilogram on a decimal basis. Its modern international standard is the International System of Units (SI).
In 1999, NASA lost a $327.6 million Mars probe to a measurement unit mix-up. Lockheed Martin sent data in pound-force seconds; NASA entered it into a newton-second program without converting. The orbiter drifted off course and burned up in Mars's atmosphere.
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