Symbian

Symbian OS was originally owned by Symbian Ltd. Latter in 1998 companies like Nokia, Ericsson, Symbian come together and renamed it Symbian OS.

First devices to use Symbian OS were Ericsson R380 and were also referred to as first Smartphone. Later Nokia 9210 Communicator was regarded to be the first open phone based in Symbian Foundation was established which was a non-profitable organization and in 2010 Symbian Platform was officially made available as open source. Before Android and iOS Symbian was the market leader in mobile phones OS. Until 2011 Symbian OS was at the top in market share but now a behind Android. This made Nokia replacing Symbian with Window Phones as the OS for its future mobiles phones.