John Rigby & Co. - NCIC firearms make code (NCIC)
Oil or other rig - FCC application structure code (FCCC)
Rabies Immune Globulin - Immunology
Radar Image Generator (ACAE)
Radio Inertial Guidance (AAG)
Radio Interference Guard
Random Identity Generator - A program
Rate Integrating Gyro
Rate Integration Gyro (SAUS)
Refractive Index Gradient - Analytical chemistry
Regional Inspector General (SAUS)
Register Interference Graph
Related Interest Group (SAUS)
Research Initiation Grant (SAUS)
Restricted Interagency Group (SAUS)
Ridgeling - Horse racing
Riga Airlines - Latvia - ICAO designator (FAAC)
Rigging (ROG)
Rio Grande - Brazil - Airport symbol (OAG)
Rochesters Intelligent Gateway (SAUS)
Roll-Imitation Gold
Royal Institue of Geology - British (NUCP)
Sonat Offshore Drilling - NYSE symbol
Sonat Offshore Drilling, Inc. - NYSE symbol (SPSG)
Transocean Offshore, Inc. - NYSE symbol (SAG)
Rigoni - Botanist in plant scientific name (HUH)
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