🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTiếng ViệtРусский한국어中文日本語EntityQ408990· pop 15· linked from 2 articlesIRSWikimedia disambiguation pageAvailable in 15 languagesFrançaisDeutsch中文日本語РусскийItalianoCatalanFinnishHebrewNederlandsPolskiRomanianConnectionsinfrared radiationEntityInternational Union of RailwaysEntity