🌐EnglishEnglishBahasa IndonesiaEspañolFrançaisItalianoTürkçeالعربيةفارسیไทย한국어中文EntityQ7210420· pop 21Category:Telecommunication theoryWikimedia categoryAvailable in 20 languagesEspañolFrançais中文ItalianoالعربيةBahasa IndonesiaBanglaBulgarian