JS-1

JS-1, JS1, or variant, may refer to:


 * JS-1 heavy tank, Josef Stalin 1 Soviet WWII tank
 * Ligier JS1, 1969-1970 sportscar from Ligier
 * ECMAscript 1.0 (JS1.0), JavaScript standard, see JavaScript
 * JScript 1.0 (MS JS 1.0), Microsft Javascript variant, see JScript
 * Oldsmobile Jetstar I (JS1) 1960s sedan
 * Jonker JS-1 Revelation, sailplane
 * JS1 (phylum), a candidatus phylum of bacteria now called afribacteria
 * Choa Chu Kang MRT/LRT station, Singapore, station code JS1