Nokia 5 user guide pdf article is about the operating system. Not to be confused with Sybian or Symbion.
Nokia, first released in 2002 and powering most Nokia smartphones. The Symbian Foundation disintegrated in late 2010 and Nokia took back control of the OS development. Symbian originated from EPOC32, an operating system created by Psion in the 1990s. In June 1998, Psion Software became Symbian Ltd. Afterwards, different software platforms were created for Symbian, backed by different groups of mobile phone manufacturers.
Although Symbian was difficult to program for, this issue could be worked around by creating Java Mobile Edition apps, ostensibly under a “write once, run anywhere” slogan. This wasn’t always the case because of fragmentation due to different device screen sizes and differences in levels of Java ME support on various devices. In June 2008, Nokia announced the acquisition of Symbian Ltd. Nokia became the major contributor to Symbian’s code, since it then possessed the development resources for both the Symbian OS core and the user interface. Since then Nokia maintained its own code repository for the platform development, regularly releasing its development to the public repository.
Q42010, Symbian was losing ground to iOS and Android quickly, eventually falling behind Android in Q42010. By 5 April 2011, Nokia ceased to openly source any portion of the Symbian software and reduced its collaboration to a small group of pre-selected partners in Japan. Source code released under the EPL remains available in third party repositories. On 22 June 2011, Nokia made an agreement with Accenture for an outsourcing program. 2,800 Nokia employees became Accenture employees as of October 2011. The transfer was completed on 30 September 2011.
Nokia terminated its support of software development and maintenance for Symbian with effect from 1 January 2014, thereafter refusing to publish new or changed Symbian applications or content in the Nokia Store and terminating its ‘Symbian Signed’ program for software certification. 15-key augmented telephone keypad, or the mini-QWERTY keyboards. 3 includes the Qt framework, which is now the recommended user interface toolkit for new applications. Qt can also be installed on older Symbian devices. 3 devices as a Qt update.