Now there are a few new surprises and nothing is more murkier than the orb of the tech world.
Firefox OS. Mobile OS.
There is another linux flavoured OS - Ubuntu OS. The system that almost completely gave a new accessible front for garden variety users to try to use Linux in a GUI without knowing too much of cat or dog commands, grape and grep.
That is not the final list.
There is Tizen. Something from Tarzan's book? Nope. It is a completely open sourced system that was formerly merge by some other sub entities and scraps of HP's OS and another open OS.
There is also the existing Nokia Symbian (from S60) and MeeGo. Nokia Pureview 808 is the final hardware that has Symbian on it.
If this seems like a inter-stellar operating system war, Star Wars and Star Trek combined, isn't it interesting that we are the audience or part of the participants?
Back in the days of DOS, there was a micro war between DOS (and Win3.11) with Mac (I forgot what their OS is called) and another by IBM called OS/2. Operating System Slash 2. It would have been totally cool if it existed during the heyday of Slash of Guns n Roses. So as a small history lesson, OS/2 simply died even though it had a huge Empire backing. Huge. Big. Like Facebook's money.
The OS war was won by Bill Gates aka. DOS and Win 3.11 and Win 95 and WinXP. If Microsoft hadn't helped developed some port of Office for Apple products, Apple itself would have closed shop. The irony was sympathy for the devil really wasn't called for. Now Apple's hardware department bigger than Despicable Me's wall of ion cannons and great white sharks.