Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym RIRG is...

RIRG is

Radiocarbon And Isotope Research Group
Rural Issues Reference Group
Risk Insurance Research Group
Racial Incidents Review Group
Risk And Insurance Research Group
Racial Incident Response Group
Regional Information Reference Group

More Meanings For RIRG:

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Radiocarbon And Isotope Research Group
Rural Issues Reference Group
Risk Insurance Research Group
Racial Incidents Review Group
Risk And Insurance Research Group
Racial Incident Response Group
Regional Information Reference Group

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