It includes various types of operarting systems.

1. Operating System
BY ARJUN
IX - A

2. Some OS used are:
Windows
Unix
Linux
Mac OS
Android

3. Windows
Windows has the best GUI (Graphical User
Interface). It is very much user friendly.It has
many versions of it, the most popular ones
are:
Windows XP
Windows 7
Windows 8 & 8.1
Windows 10

4. Unix
UNIX, multiuser computer operating system. UNIX is
widely used for Internet servers, workstations, and
mainframe computers. UNIX was developed by AT&T
Corporation's Bell Laboratories in the late 1960s as a
result of efforts to create a time-sharing computer
system.
Flavours of Unix:
 Reliant UNIX
 Solaris

5. Linux
Linux is a Unix-like computer operating system assembled
under the model of free and open-source
software development and distribution. The defining
component of Linux is the Linux kernel. The Free Software
Foundation uses the name GNU/Linux .
Some versions of it are:
 BOSS (Bharat Operating System Solutions).
 Aptosid
 Ubuntu
 Knoppix

6. Mac OS
Mac OS is a series of graphical user interface-based operating systems
developed by Apple Inc. for their Macintosh line of computer systems. The
original operating system was first introduced in 1984 as being integral to
the original Macintosh, and referred to as the "System".
Some versions of it are:
 5.3 Mac OS X 10.1 Puma.
 5.4 Mac OS X 10.2 Jaguar.
 5.5 Mac OS X 10.3 Panther.
 5.6 Mac OS X 10.4 Tiger.
 5.7 Mac OS X 10.5 Leopard.
 5.8 Mac OS X 10.6 Snow Leopard.

7. Android
Android is a mobile operating system developed by Google,
based on the Linux kernel and designed primarily
for touchscreen mobile devices such as smartphones and tablets.
Some versions of it are:
 Jelly bean
 Kit Kat
 Lollipop
 Marshmallow
 Nougat