What is a mobile operating system?
A mobile operating system is an operating system (the most basic instructions to allow a device to load software and control hardware) specifically for mobile devices.
Today's smartphones are much the same thing as a mobile computer. Windows phones even have a mobile version of Windows Operating System. That's what mobile computing really is. It's just the use of mobile "smart phones" which have operating systems like computer. The operating system enables phones to run applications or "apps", for uses from banking to games.