R2-series Droid
the second model in Industrial Automaton's R series of astromech droids, the R2 was considered the most popular series ever produced, since it interfaced with most of the starships in production and was small enough to fit on a starfighter. IA promoted the R2-series with the slogan, "No job is over this little guys head." It was first introduced about five years before the start of the Galactic Civil War, and remained in active production well beyond severeal other, later R-series models. Note that The New Rebellion indicates that the R2 series is sixteen models outdated within 25 years.