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The black boxes used on aircrafts are devices that record information related to flights and the analysis is used to determine the causes of an incident or accident. Contrary to what their name might suggest, these boxes are orange or red, which facilitates the search if the aircraft is destroyed. There are two types of black boxes with complementary roles, the FDR and CVR. It is to the French engineer François Hussenot that we owe the first flight recorders, but the authorship of the black boxes as we know them today, is attributed to Dr. David Warren. The first prototype FDR was produced in 1957. Shortly before that date, a series of accidents had occurred which left no survivors. Hence the idea of building ultra-resistant recorders capable of withstanding the apocalyptic conditions was born. The flight recorders are now greatly improved. The cost has also increased, and is between 10,000 and 15,000 dollars for each of the two black boxes.