Flight helmets were a type of headgear commonly wore by beings piloting starfighters. In military organizations like the Rebellion, certain helmets were worn by certain starfighter wings. Usually, these helmets included some atmospheric comfort technology as well as a microphone. Many nonhuman versions of flight helmets existed.
Source:Star Wars: The Complete Visual Dictionary (2006)
IT-O Interrogator droids were small spherical hovering droids designed by the Empire to question prisoners. IT-Os were originally exclusively used by the Imperial Security Bureau, IT-Os found their way into broader Imperial use as the rumors of their effectiveness spread. They were equipped with truth chemicals and many instruments capable of causing extreme pain.
Source:The New Essential Guide to Droids (Art: Ian Fullwood; 2006)
First Appearance: Star Wars: From the Adventures of Luke Skywalker (1976)