The meaning of the Acronym RR is...

RR is

• Readiness Review
• Reporting Responsibility
• Requirements Review
• Reference Receiver
• Relevant Rank
• Rounds Remaining
• Royal Ranger
• River Rats
• Rebel Rocket
• Recruitment and Retention
• Refit and Repair
• Rough Riders

More Meanings For RR:

• Rapid Rise
• Removal Rate
• Rugged Ridge
• Rarum Rarisimus
• Relevant Ranks
• Risk Ratio
• Red Rain
• Risk Reduction
• Results Ready
• Re Register
• Research Report
• Registration Room
• Receiving Record
• Revenue Recognition
• Ramage and Ramage

RR is also in:

• Accounting
• Chemistry
• Electronics
• Firms
• Geology
• Libraries
• Mathematics
• Meteorology
• Ocean Science
• Universities