Gyro-balance circuitry provided machines with three-dimensional direction-sensing capabilities. The devices were found in droids—as the part of the behavioral circuitry matrix—and vehicles, giving them stability in all three planes.
- "Thank the Maker"—Star Wars Tales 6 (As "balance gyro")
- Star Wars Droids: Rebellion 1
- Star Wars Droids: The Protocol Offensive
- Han Solo at Stars' End (page 149) (First appearance)
- Splinter of the Mind's Eye (As "internal gyros") (First mentioned)
- A Guide to the Star Wars Universe (As "gyro-balance circuitry")
- Cracken's Rebel Field Guide (As "Gyro-Balancer")
- Star Wars Encyclopedia
- The Complete Star Wars Encyclopedia
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