Black box or flight recorder is an electronic device that records various information from an airplane for enabling investigation of aviation accidents. It was invented in the 1950s by David Warren. It is an orange colored device that helps establish the causes of the accident and prevent the same in the future. There are 2 recorders: a Cockpit Voice Recorder and a Flight Data Recorder. Recently, the black box from the downed Sriwijaya jet was retrieved by the Indonesian authorities.