A black box was a device which recorded the movement of a vehicle. If the vehicle crashed, the black box could be used to find out what happened.
Ships during the Dark Times, such as the Infinite, used data chips as a black box. (TV: The Infinite Quest [+]Loading...["The Infinite Quest (TV story)"])
In the 21st century, the Sycorax used stone spheres as black boxes. (COMIC: The Widow's Curse [+]Loading...["The Widow's Curse (comic story)"])
The Rokathia black box was used by the Rokathia. They were intelligent and telepathic, allowing them to control people into sending a message. (COMIC: Opera of Doom! [+]Loading...["Opera of Doom! (comic story)"])
In the 51st century, ships used Home Boxes. If something went wrong on the flight, the Home Box was ejected and returned home with the flight details. (TV: The Time of Angels [+]Loading...["The Time of Angels (TV story)"])