The SP-4 analysis droid was an analysis droid model that was used to provide analysis assistance to organic beings as early as the Ruusan Reformations of the Galactic Republic. The Jedi Order made a large purchase of SP-4 units for use in the Jedi Temple's analysis wing.
After production began on the line, the Jedi Order purchased a large number of SP-4's to operate the analysis wing of the Jedi Temple in conjunction with several JN-66 droids. Between the two models, the JN-66's worked with most of the specialiezed equipment while the SP-4's handled the menial tasks, such as direct Jedi-interface. All of the droids and their computers shared data with the Coruscant Security Force, making it easier to hand criminal cases over to different jurisdictions and to ensure a comprehensive database was maintained. All droids at the Temple were stripped of coverings for frequent irradiation baths so as to not contaminate the analysis chamber. The SP-4 was designed to have more intelligence than the average worker droid; this was supplemented by a wireless tie in to computers of the Jedi Archives, giving it the knowledge of millennia of Jedi exploration.
