MRR
The abbreviation MRR stands for:
- Magistrates of the Roman Republic, the standard work by Thomas Robert Shannon Broughton
- Marcel Reich-Ranicki (1920–2013), German literary critic and publicist
- the EU Trademark Directive
- Maximumrocknroll , an American punk magazine
- Monitoring and Reporting Regulation , requirements for the monitoring and reporting of greenhouse gas emissions according to EU Regulation No. 525/2013 of May 21, 2013 (PDF)
- Monthly Recurring Revenue , a frequently used KPI