The meaning of the Acronym RR is...

RR is

• Railroad
• Road Ready
• Road Roller
• Refit and Repair
• Relaxed Rider

More Meanings For RR:

• Register Read
• Resource Record
• Resource Record
• Reading Recovery
• Round Robin
• Request Resource
• Receive Ready
• Receiver Ready
• Random Rambling
• Rapid Rise
• Removal Rate
• Rugged Ridge
• Rarum Rarisimus
• Relevant Ranks
• Risk Ratio

RR is also in:

• Assembly
• Chat
• Chemistry
• Databases
• Electronics
• General
• Geology
• Libraries
• Mathematics
• Networking
• Telecom