R1-series Droid
this was the first true series of mass-produced astromech droids developed by Industrial Automaton. Following closely on the heels of the failed P2-series droid, the R1-series saved on development costs by reusing the shell of the Mark II reactor drone. The R1 series was equipped with a standard Intellex III computer. The primary drawback to the R1 series was its size, which relegated the droid to use aboard capital ships.