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Symbian OS
Developer	Symbian Ltd. (1998–2008); Symbian Foundation (2008–11); Nokia (2010–11); Accenture on behalf of Nokia (2011–13)
Written in	C++
OS family	RTOS
Working state	Discontinued
Source model	Closed source, previously open source (2010–11)
Initial release	5 June 1997; 26 years ago (as EPOC32)
Latest release	Nokia Belle Feature Pack 2 / 2 October 2012
Repository	{{URL\|example.com\|optional display text}};
Available in	Multi-lingual
Update method	65
Package manager	.sis, .sisx, .jad, .jar
Platforms	ARM, x86
Kernel type	Real-time microkernel, EKA2
Default; user interface	S60 (from 2009)
License	Proprietary, previously licensed under EPL
Official website	symbian.nokia.com (defunct as of May 2014), symbian.org (defunct as of 2009–10)

Symbian OS is an operating system for mobile devices. It is designed for smartphones.

Developer	Symbian Ltd. (1998–2008) Symbian Foundation (2008–11) Nokia (2010–11) Accenture on behalf of Nokia (2011–13)
Written in	C++
OS family	RTOS
Working state	Discontinued
Source model	Closed source, previously open source (2010–11)
Initial release	5 June 1997; 26 years ago (1997-06-05) (as EPOC32)
Latest release	Nokia Belle Feature Pack 2 / 2 October 2012
Repository	`{{URL\|example.com\|optional display text}}`
Available in	Multi-lingual
Update method	65
Package manager	.sis, .sisx, .jad, .jar
Platforms	ARM, x86
Kernel type	Real-time microkernel, EKA2
Default user interface	S60 (from 2009)
License	Proprietary, previously licensed under EPL
Official website	symbian.nokia.com (defunct as of May 2014), symbian.org (defunct as of 2009–10)