Series 40 is a software platform and application user interface (UI) software on the Nokia range 's wide of mid-tier feature phones, as well as on line Vertu luxury phones. This is the platform most widely used mobile phones in the world and are found in hundreds of millions of devices. It provides communications applications such as telephone, internet telephony (VoIP), messaging, email client with POP3 and IMAP4 capabilities and Web browsers, media applications such as camera, video recorder, music / video player and FM radio, and phone books and personal information management ( PIM) applications such as calendars and tasks. Basic file management, such as the Series 60, provided in the Applications folder and subfolders and Gallery. Gallery is also the default location for files transferred via Bluetooth to be placed. The user-installed applications on the Series 40 Java applications generally. Flash Lite applications are also supported, but most are used for the screensaver. The new is the addition of the menu map. Integrated web browser can access most web content through the service provider XHTML / HTML gateway. . New browser support for HTML 4.01, CSS2, JavaScript 1.5, and Ajax. Support for SyncML synchronization with external services from the address book, calendar and notes are present. But with a lot of S40 phones, this synchronization settings must be sent via text message OTA. Series 40 is an embedded software platform that is open for software development or a de facto standard through content and application development technologies. Supports Java MIDlets, ie Java MIDP and CLDC technology, which provides the location, communication, messaging, media and graphics capabilities. S40 also supports Flash Lite applications. 
Source : Wikipedia
