
1) Discontinued operating system
Found on
https://www.crosswordclues.com/clue/symbian

Symbian is a closed-source mobile operating system (OS) and computing platform designed for smartphones and currently maintained by Accenture. Symbian was originally developed by Symbian Ltd., as a descendant of Psion`s EPOC and runs exclusively on ARM processors, although an unreleased x86 port existed. The current form of Symbian is an open-sou....
Found on
http://en.wikipedia.org/wiki/Symbian

Joint venture of Psion (the originators), Ericsson, Nokia and Motorola to promote EPOC an operating system for handheld devices, see Symbian. Contrast Windows CE.
Found on
http://www.encyclo.co.uk/visitor-contributions.php

Symbian is the name of the company that develops Nokia's S60 phone operating system and Sony Ericsson's UIQ phone operating system
Found on
https://www.encyclo.co.uk/local/21186
No exact match found.