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Category:Protocol droids | Wookieepedia - Fandom
Protocol and Service Droids | Wookieepedia | Fandom
3PO-series protocol droid | Wookieepedia | Fandom
Protocol Droid | StarWars.com
C-3PO - Wikipedia
C-3PO (See-Threepio) - StarWars.com
C-3PO | Disney Wiki | Fandom
Protocol Droid | Star Wars Wiki | Fandom
Protocol Droid | Star Wars Saga Edition Wiki | Fandom
The Many Looks of the Protocol Droid - IGN