Home›Browse›notation🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTiếng ViệtTürkçeРусскийالعربيةفارسیहिन्दी한국어中文日本語EntityQ2001982· pop 12· linked from 51 articlesnotationSign in to savesystem of symbols to represent facts or quantitiesAvailable in 12 languagesDeutsch中文العربيةहिन्दीDanishFinnishLojbanNederlandsSvenskaUkrainianفارسیvia Wikidata sitelinks · CC0