RRA
RRA is the abbreviation for:
- Stormwater retention system
- Rahanweyn Resistance Army, a Somali civil war faction in Südwestsomalia
- Round robin archives, a data storage method of RRDtool
- Relative risk aversion by Arrow and Pratt, a measure of the risk aversion of a decision
RRa is the abbreviation for:
- Right to travel date, a German journal in the field of travel law
- Disambiguation
- Abbreviation