 It indicates a printer error that requires further investigation to diagnose, but not necessarily that it is on fire.In the late 1950s, high speed computerized printing was still a somewhat experimental field.The first documented fire-starting printer was a Stromberg-Carlson 5000 xerographic printer (similar to a modern laser printer, but with a CRT as the light source instead of a laser), installed around 1959 at the Lawrence Livermore National Laboratory and modified with an extended fusing oven to achieve a print speed of one page per second.