A "black box" refers to a system or device whose internal workings are not visible or understood, making it a mystery. In various fields, such as engineering, computer science, and psychology, black boxes are used to describe processes where inputs and outputs are known, but the mechanism in between is hidden or complex. In the context of aviation, a black box is a crucial device that records flight data and cockpit conversations. Despite its name, it is typically bright orange for visibility. Investigators analyze these recordings after accidents to uncover what happened, making the black box an essential tool for improving safety.