1. The full form of DOS is Disk Operating System.
2. Windows is a series of operating systems that are designed by Microsoft.
3. Windows is the most commonly used operating system.
4. Apple Corporation’s registered operating system is called Mac OS.
5. Chrome OS is an open-source operating system created by Google.
6. Linux is an open-source, portable, multi- multiprogramming, operating system.
7. Android is a free and open-source operating system for mobile phones provided by Google.
8. Asha is used by Nokia phones. This is a closed source OS.
9. Blackberry is a closed source operating system for smartphone and tablet devices.
10. IOS is Apple’s closed source operating system for Apple’s iPhone, iPod Touch, iPad, and second-generation Apple TVs.
11. Windows Phone is developed by Microsoft as a closed source operating system for mobile phones.
12. Linux is used as the predominant backbone of the Internet.
13. Ubuntu is one of the most popular GNU/Linux distributions.
