Mobile operating systems control mobile devices similar to an operating system such as Windows which controls a computer. However, they simpler, and deal with broadband connectivity, mobile multimedia formats, and different input methods.

Examples
Smartphones (Windows Mobile, Android, iPhone)
Personal digital assistants (PDAs) (Black Berry O/S)
Tablet computers

Smartphone operating systems

• Nokia's Symbian
  
• Google's Android
  
• Apple's iOS
  
• RIM's BlackBerry OS
  
• Microsoft's Windows Phone
  
• Linux
  
• Palm/HP's WebOS
  
• Samsung's Bada
  
• Nokia's Maemo and Meego
  

Android, Bada, WebOS, Maemo, iOS are derived from open source Unix based operating systems

 Comparrison of Mobile operating systems