The true statements regarding the development or marketing of operating systems are:
- Apple is the registered owner of the Mac OS.
- The Windows operating system is a Microsoft (note: the sentence appears to be incomplete, but it is implied that it is developed and marketed by Microsoft).
The other statements are false:
- iOS is developed and marketed by Android is incorrect; iOS is developed and marketed by Apple.
- Google does not develop operating systems is incorrect; Google develops several operating systems, including Android and Chrome OS.