three-letter acronym
Acronym
Alphabet agencies
ISO 4217 (currency code)
List of abbreviations in photography
List of computing and IT abbreviations
List of three-letter broadcast call signs in the United States
List of three-letter combinations having Wikipedia articles
List of three-letter acronym disambiguation pages on Wikipedia
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Lists of airports by IATA and ICAO code
Q code
Recursive acronym
RAS syndrome
Country code § Lists of country codes by country
https://en.wikipedia.org/wiki/Three-letter_acronym