British Independent Airways - ICAO designator (AD)
Capitol Air Service - ICAO designator (AD)
Excess Reserves
IMS Health - Company symbol
Prescription (SAUS)
Rank Xerox
Receive (NITA)
Receiver - or Reception - Radio (NATG)
Receiver Controller (UWER)
Receive Signal (SAUS)
Recommend - Telegraphy (PCTE)
Reconnaissance-Experimental (SAUS)
Reconnaissance-Experimental Aircraft
Regional Exchange (SAUS)
Register and Indexed (SAUS)
Register and Indexed Storage (MCD)
Register Index (SAUS)
Register to Indexed Memory (SAUS)
Remote Exchange - Telecommunications (TEL)
Repairable Exchange
Report Crossing - Aviation (PIPO)
Resolver-Transmitter
Reverse (SAUS)
Rix-Dollar - British (ROG)
Rupees - Monetary unit - Ceylon, India, and Pakistan (ROG)
Rush - on teletype messages
Reaction - Laboratory science (DAVI)
Prescription - Therapy term (CTAA)
Receiver (PIAV)
Recipe - Used as a symbol for medical prescriptions
Recording (ODA)
Recrystallized (UWER)
Re-examine (SPVS)
Therapy (DAVI)
Unknown Resistance (IDOE)
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