R4 astromech droid

R4 astromech droid, also referred to as R4-series, R4 unit, or R4 agromech unit was a model of R-series astromech droid manufactured by Industrial Automaton. It was identical in appearance to the R2-series, except that its dome was conical instead of hemispherical. The official Press Corps of the Galactic Empire used repurposed R4 units as courier droids, as a means to physically transport data.

The R4-P Astromech was a modified model of the R4. R4-P44, R4-P17, and R4-G9, were R4-P who had the dome of a R2 unit.

The R4 courier droids, were modified R4 droids used by the Galactic Empire designed to be couriers, carrying information from one place to another, avoiding the use of networks.

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