The LOM-series protocol droid was a model of protocol droid manufactured by Industrial Automaton. They were designed with insectile features to emulate the species they were designed to serve. 4-LOM was a LOM-series protocol droid who overrode his programming and became a bounty hunter. The LOM-series had a flaw that allowed the personality software of a droid to be corrupted. Many LOM-series droids became enforcers in the Outer Rim Territories.
- Star Wars 7: From the Journals of Old Ben Kenobi: "The Last of His Breed"
- Star Wars 1: Skywalker Strikes
- Darth Vader 1: Vader
- Star Wars: Episode V The Empire Strikes Back (First appearance)
- Ultimate Star Wars (First identified as LOM-series protocol droid)
- Star Wars: Card Trader
- Star Wars Character Encyclopedia: Updated and Expanded
- Star Wars Expanded Universe (Set: 75167 Bounty Hunter Speeder Bike Battle Pack)