Even before the BUG WARS, the RU transport units were already famous as vehicles for civil corporations. Almost every commercial company in the world had a line of such transports. The main reason for that was their versatility - they could be used as mere transports - even money transports for banks, tourism tours and there were even a dozen RU units turned into limousines.
First concepts were developed by Ultralight Industries
. With the formation of the H.U.N., nationalization of many private industries came to be a reality. The RU units, due to their high performance, high usability reach and long life were made into escort units for high profile and high ranking members of government. The H.U.N. was now producing transport ships for themselves. Nonetheless, most companies still used their older versions of the RU, making it a very common sight in the large city's skies.