Otherwise known as the strategy perfected by JPL in 1998 for the Mars Climate Orbiter . . . one in English units and the other in metric.

K9ZTV


On 1/17/2015 12:13 PM, someone wrote:
For critical systems, there are often two different programs, written by different groups of programmers, either of which can "fly" the airplane. The assumption is that they'll have different bugs.

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