Unfortunately, its evolution has ended with Nokia 808 PureView as its last descendant. It is considered as one of the foundations in the smartphone industry before Android and iOS completely left it in the dust.
Symbian was designed and maintained by Accenture and originally developed from Psion's EPOC OS. Then it became an open-source platform similar to what Android is now and developed by Symbian Foundation in 2009. Later, it was used by many major mobile phone brands such as Samsung, Motorola, Sony Ericsson and Nokia.
Nokia acquired Symbian in 2008 and most of its devices back then run on Symbian OS until the shift to Microsoft's Windows in 2011, making the once-lead OS as its franchise platform.
Even though Symbian is departing the tech world, it did leave notable key features that made its identity worthwhile.
1. Performance: Symbian OS is designed not to stress the batteries due to its low memory. It does not make tasking demands to the device.
2. Multitasking: All applications in Symbian OS are designed to be cooperative so that memory, speed, and battery will not compromise each other.
3. Standards: Open-source platform capability ensures that all applications installed are stable, portable, and user friendly.