🌐한국어EnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTiếng ViệtTürkçeРусскийالعربيةفارسیहिन्दी한국어中文日本語EntityQ959968· pop 42· linked from 536 articlesplcsystem that manages the behavior of other systemsAvailable in 39 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةहिन्दीConnectionsrefrigeratorEntityPID controlerEntityCategoriesAutomationControl engineeringControl theorySystems engineeringSystems theory