JST is a three-letter abbreviation with multiple meanings, as described below:Japan Standard TimeJapan Science and Technology Agency (?????????????? Dokuritsu Gyousei Houjin Kagaku Gijutsu Shinkou Kikou)Johnstown-Cambria County Airport (IATA airport code JST)Joseph Smith Translation of the BibleJavaScript Synthesis TechnologyJubilee Sailing TrustJSTJSTJSTJSTJSTJST