Symbian OS

All About Symbian
Community offering user support, news, reviews and software for Symbian based phones.
http://www.allaboutsymbian.com/

My-Symbian.com
Portal for users of Symbian based communicators and smartphones. Includes news, software downloads and both English and Polish language discussion forums.
http://my-symbian.com/

Series 60 Platform
Smartphone platform for Symbian OS which incorporates a user interface and some supporting functions such as messaging and calendar. Includes a software development kit for the platform, details of recently developed applications and information on devices currently using it.
http://www.series60.com/

The Smartphone Show
Symbian sponsored mobile industry conference featuring seminars, training and a tradeshow arena. Annual event held in London, UK.
http://www.thesmartphoneshow.com/

Symbian SDK on Unix HOWTO
Describes a method for getting some parts of the Symbian SDK going on a Unix machine.
http://www.koeniglich.de/sdk2unix/symbian_sdk_on_unix.html

Symbian Signed
Application digital signing programme run by Symbian. Includes details of test criteria, a FAQ and details of the process to be followed by developers.
https://www.symbiansigned.com/

SymbianOne
Resource site for Symbian developers. Includes news, product review, technical information on Symbian based devices and discussion forums.
http://www.symbianone.com/

SymbianOS.org
Portal site for open source developers. Includes links to projects, discussion forums, mailing lists and a CVS repository.
http://symbianos.org/

UIQ Technology
Developers of a mobile phone user interface that uses the Symbian platform. Includes phones currently sporting the interface and a downloadable software development kit for the UIQ platform.
http://www.uiq.com/

Wikipedia.org
Article discussing the operating system, its history and devices that use it.
http://en.wikipedia.org/wiki/Symbian_OS