Symbian OS
Symbian OS is one of the most popular smartphone platform is designed like many desktop operating systems with multitasking and memory protection. In Symbian OS was designed to provide the integrity and security of user data while saving user time and get maximum benefit from the limited resources available with the mobile platform.
With its root from Psion Software’s EPOC, it has the following system structure:
The Symbian OS System Model contains the following layers, from top to bottom:
* UI Framework Layer
* Application Services Layer
o Java ME
* OS Services Layer
o generic OS services
o communications services
o multimedia and graphics services
o connectivity services
* Base Services Layer
* Kernel Services & Hardware Interface Layer
Of the Symbian Versions, the latest version is Symbian OS 9.5 that supports digital television broadcasts in DVB-H and ISDB-T formats, and provide location services. With touchscreen and many more facilities, Symbian is one of the most advanced and increasingly popular mobile operating system.



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