🌐한국어EnglishDeutschEspañolFrançaisItalianoPolskiPortuguêsTiếng ViệtTürkçeРусскийفارسی한국어中文日本語EntityQ7251920· pop 23· linked from 225 articles인터페이스Also known as protocol, traitpurely abstract class in object-oriented programmingAvailable in 22 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsAlbanianBelarusianConnectionsclassEntityInternational Standard Book NumberEntityCategoriesData typesObject-oriented programmingProgramming language comparisons