Nungu - Language code (ETLW)
Radio Inertial (MSA)
Rassemblement pour l'Independance Nationale - Quebec separatist party, 1960-1968 - Canada
Rat Insulinoma - A cell line
Realty Information Network (GIS)
Record Identification Number
Redpath Industries Ltd. - Toronto Stock Exchange symbol
Reference Indication Number
Reference Indicator Number (SAUS)
Register In (SAUS)
Register in Instruction - Computer science (IAA)
Register Instruction (SAUS)
Regular Inertial Navigator (MCD)
Regulation Identifier Number (SAUS)
Regulatory Identifier Number - Environmental Protection Agency
Relative Intensity Noise (CIST)
Remote Intelligent Network (SAUS)
Report Identification Number - Military (AABC)
Resistance, Input (SAUS)
Resource Identification Number (SAUS)
Ringi Cove - Solomon Islands - Airport symbol (OAG)
Rinker Group Ltd. - Australian Stock Exchange symbol
Rotor Impulsive Noise - Helicopters
Routing Instruction Note (ACAE)
Royal Indian Navy
Royal Institute of Navigation (DS)
Springfield, MO - Location identifier - FAA (FAAL)
Riner's Reports - 2 Wyoming - A publication (DLA)
Input Resistance (IDOE)