R1-G4:
R1 Astromech Droid by Industrial Automaton- Replaced by Newer model R2 Units

R2-A1:
R2 Astromech Droid by Industrial Automaton- Typical Imperial R2 unit, searched the Tantive IV's memory banks for the Death Star Plans

R2-A5:
R2 Astromech Droid by Industrial Automaton- Combat astromech, specializes in Auto-laser fire

R2-A6:
R2 Astromech Droid by Industrial Automaton- Played a major role in the Battle of Naboo with Ric Olie

R2-B1:
R2 Astromech Droid by Industrial Automaton- Droid onboard the Marie Celeste, helped repair the starboard engine while R2-D2's crew repaired the shields

R2-D1:
R2 Astromech Droid by Industrial Automaton- Assisted with repairs onboard Queen Amidala's ship, the Marie Celeste, died in a ball of fire...

R2-D2: Helped both Anakin and Luke Skywalker, saved Obi-Wan Kenobi's life

R2-D3:
R2 Astromech Droid by Industrial Automaton- Repaired the strboard engines on the Marie Celeste while R2-D2 fixed the shields... Was killed by the Trade Federation.

R2-G2:
R2 Astromech Droid by Industrial Automaton- Helps maintain the Podrace pit area with his owner, Mac Traaj

R2-N6:
R2 Astromech Droid by Industrial Automation- Maintenance droid onboard the Jindirian Valley, helps ensure a safe and smooth ride for those looking to emigrate from Coruscant.

R2-Q2:
R2 Astromech Droid by Industrial Automaton- Last seen on Captain Antilles' ship, Tantive IV

R2-Q5
R2 Astromech Droid by Industrial Automaton- Typical bland Imperial astromech droid, often repairs conduits in Death Star 2

R2-R9:
R2 Astromech Droid by Industrial Automaton- Droid onboard the Marie Celeste, vicim of an unfortunate accident before leaving the cargo hold...

R2-X2:
R2 Astromech Droid by Industrial Automaton- Used by Theron Nett's Red 10 X-wing in the Battle of Yavin

R3-A2
R3 Astromech Droid by Industrial Automaton- Special purposes Astromech, commended for it's part in the Battle of Hoth

R3-T2:
R3 Astromech Droid by Industrial Automaton- Escaped from pirates based in Mos Eisley, has expanded memory capacity and is capable of repairing and sabotaging hyperdrive systems. Sold to Wedge Antilles before the Battle of Yavin

R3-T6:
R3 Astromech Droid by Industrial Automaton- More advanced model of Astromech droid used by the Empire

R4-E1:
R4 Astromech Droid by Industrial Automaton- Companion to BoShek the spacer

R4-I9:
R4 Astromech Droid by Industrial Automaton- Standard Imperial R4 unit. Like all Imperial droids, has a memory inhibitor to protect it from developing a personality

R4-M9:
R4 Astromech Droid by Industrial Automaton- Used by the Empire to copy databanks of Tantive IV

R4-T8:
R4 Astromech Droid by Industrial Automation- Longtime resident of Mos Espa, abandoned after former master was killed by minions of Jabba the Hutt after a deal gone sour. Continually searches the local spaceport for a new master and an oil bath.

R4-P17:
R4 Astromech Droid by Industrial Automaton- R4-P17 started off as a traditional R4 unit, complete with the characteristic conical head, when she was nearly destroyed in a trash compactor mishap on Gyndine. While inspecting the Jedi customizations of the Delta-7 designs, Anakin Skywalker happened upon the wrecked little droid and rebuilt it. The new R4-P17 sported an R2-series dome and would eventually become the prototype for other integrated droid navigators aboard the Jedi Aethersprite fighters.

R5-A1
R5 Agromech Droid by Industrial Automaton- Imperial Agromech used to compute the position of the escape pod on Tatooine

R5-A2:
R5 Agromech Droid by Industrial Automaton- Used mainly for Hyperdrive calculations

R5-A7:
R5 Astromech Droid by Industrial Automaton- Unlucky agromech who assisted with R2-D2's repair work

R5-D4:
R5 Agromech Droid by Industrial Automaton- Good with calculations, bad with general operations, he was sabotaged by Artoo to stay with C-3PO, possible spy for the Empire

R5-D8:
R5 Agromech Droid by Industrial Automaton- Porkins' Astroemch droid, R5-D4 took his place shortly before the Battle of Yavin, resulting in Porkins' untimely demise. R5-D8 took Porkins' death extremely badly and flew with Jet Porkins during the Battle of Endor

R5-H6:
R5 Agromech Droid by Industrial Automaton- Previously owned by Gardulla the Hutt, R5-H6 was traded to a local smuggler in exchange for a small amount of exotic Quipsa spice. As of the Galactic Civil War, R5-H6 resided on Corellia

R5-DL:
R4 / R5 Agromech Droid by Industrial Automaton- Altered droid built by the small band of Jawas called the Tatooine Traders

R5-M2:
R5 Agromech Droid by Industrial Automaton- Plotted the evacuation of Echo Base

R5-X2:
R5 Agromech Droid by Industrial Automaton- Gambling droid of Jabba the Hutt, helps compute the odds and ensure a safe bet.