Astromech Droids
In Star Wars, Astromech droids (or commonly, Astro droids), were a type of droid that served as automated mechanics, performing a variety of repair duties and often serving as adjuncts or substitutes for nav computers on smaller starships. They were also able to use the mainframe of a larger ship to their advantage. Many starfighters relied on astromech co-pilots.
R2-D2 is an example of an astromech droid.
Read more about this topic: Droid (robot)