SP-4
this was a model of librarian droid, used by the Jedi Knights to provide access to their immense archives found on the planet Coruscant, during the last decades of the Old Republic. Based on the PK-series of labor droids, the SP-4 series was modified by Cybot Galactica to have enhanced sensory apparatus and behavioral circuitry which allowed it to monitor its environment. This gave the SP-4 the ability to gauge any Jedi who approached it, gleaning information from the Jedi's actions and behavior. The vocoder of the SP-4 was shaped like the long snout of a Pa'lowick.