Astromech droids are a common type of droid in the Star Wars universe. They usually appear to be short, dustbin-shaped machines with domed heads and two stubby legs, some having a third leg protruding from their undersides. They are designed to perform maintenance on starships and serve as automated co-pilots for many different classes of starfighters. They carry a wide variety of tools and gadgets to carry out their tasks. Most astromechs only communicate in binary text (via a separate computer system) or with a series of bleeps, clicks and whistles. The most recognizable makes of astro-droids are the R-Series manufactured by Industrial Automaton.