Symbian OS (operating system) is an operating system designed specifically for mobile devices. It is being developed by Symbian Ltd, a software licensing company that supplies the operating system for many data-enabled mobile phones.
As an operating system software, Symbian OS provides the underlying routines and services for application software. For example, an email software that interacts with a user through a mobile phone screen and downloads email messages to the phone's inbox over a mobile network or WiFi access, is using the communication protocols and file management routines provided by the Symbian OS.
Symbian OS technology has been designed with these key points in mind:
Nokia has made Symbian OS its strategic choice for smartphone operating systems. Nokia S60 Software, currently the most widely used software platform in the smartphone market worldwide, runs on Symbian OS - as does the advanced Nokia Series 80 Communicator devices. The Symbian OS-based Nokia Series 90 platform delivers touch screen technology and an advanced software development environment for media-rich applications.