Industrial Automaton's R9-series was similar to its previous R-series models, but R9 droids were notorious for self-enhancing their preservation routines, even if it meant hiding data from their owners.
Pilots in the New Jedi Order used R9-series astromechs as in-flight navigators and mechanics aboard their StealthX starfighters. Jedi Master Luke Skywalker was accompanied on his mission into the Gorog nest by an R9 unit named Arnie—filling in for the operationally-challenged R2-D2—and Mara Jade Skywalker flew with an R9 astro-droid she referred to as "Nine".
Jaina Solo flew with an R9 unit named Sneaker in a Jedi StealthX when spying on the secret Corellian fleet during the Second Galactic Civil War and later with one called Rowdy a few years after the war's end.
- Star Wars: Tiny Death Star (Non-canonical appearance)
- Dark Nest I: The Joiner King (First appearance)
- Dark Nest II: The Unseen Queen
- Dark Nest III: The Swarm War
- Legacy of the Force: Tempest
- Legacy of the Force: Fury
- Legacy of the Force: Invincible
- Fate of the Jedi: Allies (Retcon)
- Fate of the Jedi: Vortex
- Fate of the Jedi: Apocalypse
- The New Essential Guide to Droids (First pictured)
- The Complete Star Wars Encyclopedia (As "R9 unit")