R4 astromech droid

The R4 astromech droid 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.Rise of the Separatists R4-P44, R4-P17, and R4-G9, were R4-P who had the dome of a R2 unit.Star Wars: The Visual Encyclopedia
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.
==Appearances==
===Non-canon appearances===
*Rogue One: Recon A Star Wars 360 Experience
*LEGO Star Wars: The Skywalker Saga
*Visions – Takashi Okazaki 1
==Sources==
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*Star Wars: The Complete Visual Dictionary, New Edition
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*Star Wars Search and Find Volume I
*Rise of the Separatists 
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* Droid Depot toy line
*Droid Depot (mobile app)
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*Star Wars Encyclopedia: The Comprehensive Guide to the Star Wars Galaxy
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==Notes and references==
Category:Droid models of the Alliance to Restore the Republic
Category:Droid models of the Galactic Empire
Category:Droid models of the Galactic Republic
Category:Droid models of the New Republic
Category:R-series models