Series 40, often shortened as S40, is a software platform and application user interface (UI) software on Nokia's broad range of mid-tier feature phones, as well as on some of the Vertu line of luxury phones.
S40 (Series 40, Nokia Series 40) — широко используемая программная платформа и интерфейс пользовательских приложений широкого спектра телефонов Nokia среднего класса.