The Cyrillia planet's Cyrillian species started utilizing transports propelled by floating turbine technology on their homeworld. This occurred at some point before the year of 189 BBY. To maintain these transports, particularly tasks needing a small physique like maneuvering beneath the levitating vehicles or entering circuitry compartments, the Cyrillians engineered the DUM-series pit droid.
The New Essential Guide to Droids, a book authored by Daniel Wallace and published in 2006, contained the initial reference to Cyrillian transports, specifically within the entry detailing the DUM-series pit droid.