🌐EnglishEnglishPolskiفارسی中文日本語EntityQ7804840· pop 5· linked from 28 articlestime-variant systemsystem whose output depends on moment of observation and input signal applicationAvailable in 5 languages中文CatalanPolskiفارسیvia Wikidata sitelinks · CC0ConnectionsInternational Standard Book NumberEntitydigital object identifierEntityCategoriesControl theory