This document discusses different operating systems (OS), including Windows, Mac OS, Linux, Unix, and DOS for computers, as well as Windows Phone, iOS, and Android for mobile devices. It explains that an OS manages computer resources and provides an interface for user interaction. Examples of versions are given for each OS type.

1. Getting toGetting to
Know Different OperatingKnow Different Operating
System (O.S.)System (O.S.)

2. Operating System
• Is referred to as the manager of
the computer as it directs,
monitors and allocates
resources for programs to be
executed as needed by the user.
It also provides the interface for
which the user interacts with to
communicate with the computer.

3. Different
Computer
O.S. :

4. 1. Windows
Example distribution/
variant
 Windows 95
 Windows XP
 Windows 8

5. 2. Mac OS
Example distribution/
variant
 Mac OS X Snow
Leopard
 Mac OS X Lion
 Mac OS X Mountain
Lion

6. 3. Linux
Example distribution/
variant
 Ubuntu
 Debian
 Fedora

7. 4. Unix
5. DOS

8. Different
Mobile
O.S. :

9. 1. Windows Phone
Sample Versions:
Windows Phone 7
Windows Phone 8

10. 2. iOS
Sample Versions:
iOS 5
iOS 6

11. 3. Android
Sample Versions:
Ice-cream Sandwich
Jelly Bean