RLU
RLU is an abbreviation for:
- Room air- independent for ovens, see oven #After air supply
- Roßlau (Elbe) according to the UN / LOCODE
- RusLine , Russian airline (ICAO airline code)
- Relative Light Units , a unit of measurement for the intensity or amount of light measured by a luminometer
RLU as a distinctive sign on license plates:
- Poland: Powiat Lubaczowski in the Subcarpathian Voivodeship
