The meaning of the Acronym IRR is...

IRR is

• Ionising Radiation Regulations

More Meanings For IRR:

• The Individual Ready Reserves
• Inactive Ready Reserve
• Internal Rate of Return
• Internal Rate of Return
• Information Request Response
• Internal Rate of Return
• Internal Rate of Return
• Internal Rate of Return
• Institute of Restoration and Reclamation
• Individual Ready Reserve
• Integrated Radio Room
• Infra Red Resistant
• Inspection Rejection Report
• Integral Rocket Ramjet
• Ionising Radiation Regulations

IRR is also in:

• Accounting
• Environmental
• General
• International Business
• Military
• Mortgage
• NASA
• Police
• Stock Exchange
• Unfiled