[Caltech, ca. 1979] Any malfunctioning computer terminal. A common failure mode of Lear-Siegler ADM 3a terminals caused the ‘L’ key to produce the ‘K’ code instead; complaints about this tended to look like “Terminak #3 has a bad keyboard. Pkease fix.” Compare dread high-bit disease, frogging; see also sun-stools, HP-SUX, Slowlaris.