Inventory droid

"I am AP-5, the Imperial inventory droid, charged with the safe transport of this vessel's cargo."

- AP-5, to Chopper

An inventory droid was any droid tasked with logging every item and crew member aboard an Imperial cargo ship to ensure the safe delivery of said vessel's cargo. AP-5, a blue-plated RA-7 protocol droid, served as the inventory droid of one cargo ship that was stolen from Horizon Base by the rebel astromech Chopper.