Galalloy was responsible for manufacturing the first true probe droids to search planets and asteroids for valuable resources, such as metals to fuel the processing plants of industry. Probots later helped to expand the Republic's frontiers into the deep, unknown reaches of the galaxy.
- Galaxy Guide 3: The Empire Strikes Back
- The Star Wars Sourcebook
- The Star Wars Sourcebook, Second Edition
- The New Essential Guide to Droids
- The Complete Star Wars Encyclopedia