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RST
Wikipedia definition
1. RST codeFor other uses of the three letter acronym, see RST. The RST code is used by amateur radio operators, shortwave listeners, and other radio hobbyists to exchange information about the quality of a radio signal being received. The code is a three digit number, with one digit each for conveying an assessment of the signal's readability, strength, and tone. The code was developed in the early 20th century and was in widespread use by 1912.
Read “RST code” on English Wikipedia
Read “RSTコード” on Japanese Wikipedia
Read “RST code” on DBpedia

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