Seldon's beeper was a small personal computer developed by the Altairans. The device was wirelessly attached to the Altairan's main computer core and was able to take information from the computer relating to repair issued and print it out on a small slip of paper. Harlan used one such device, which he attached to his hip via a magnetic clip, when SG-1 first visited the planet. (SG1: "Tin Man")