The document discusses operating systems, describing their main functions and types. It explains that operating systems manage computer resources, interact with users, and run applications. Some common operating systems are described, including Windows, Mac OS, Linux, iOS, and Android. The advantages of Windows and Mac OS are also summarized, with Windows noted as more familiar but Mac OS having better security and simpler interface.

1. The Operating System

2. What is an operating system?
Operating
systems contain
a certain amount
of parts which
make up the rest
of it

3. What are the different types?
Linux is a Unix-like computer
operating system assembled
under the model of free and
open source software
.
development and distribution
Mac OS is a series
of graphical user
interfacebased operating
systems developed
by Apple Inc. for
their Macintosh
iOS (previously iPhone
OS) is a mobile
operating
system developed and
distributed by Apple
Inc. Originally unveiled
in 2007 for the iPhone,
it has been extended to
support other Apple
devices such as
the iPod Touch
Android is a Linux-based operating
system designed primarily
for touchscreen mobile devices such
as smartphones and tablet
computers. Initially developed by
Android, Inc.
Microsoft Windows is a series
of graphical interface operating
systems developed, marketed,
and sold by Microsoft.
BSD/OS had a reputation for
reliability in server roles; the
renowned Unix programmer and
author W. Richard Stevens used
it for his own personal web
server for this reason.

4. What does an OS do?
When a computer is first assembled, it is effectively cut-off from the world. It
cannot receive input or provide output. The operating system is the software
which makes the computer come alive. The operating system has three main
functions to perform:
• Manage the computer resources: The task of looking after the computer is
given to the computer itself, and in particular to the operating system. This
must manage use of the CPU, allocation of memory, access to disk drives,
control of printers and modems, and so on. All the input/output functions of
the computer are controlled by the operating system.
• Interact with the user: For a computer to be of use its user must have some
means of interacting with it. It is the operating system's task to provide a
means of doing this which is easy, consistent, flexible and structured.
• Run applications: The application packages, such as word processors or
spreadsheets, are what the user really wants to use. The operating system
provides a means of executing them, and provides the programs with tools
and services. These include commands which the application can use to
fetch data from a hard disk, or to send data to a printer. With graphical
operating systems, the application also utilizes the menu facilities and
windows design offered by the operating system.

5. Advantages of a Windows OS
 There are several advantages to using the
Windows operating system. Windows is widely
used and is more familiar to consumers than a
Macintosh computer. Microsoft has made certain
programs important to know how to use. Microsoft
Word and Excel are programs that everyone uses
for school and work. Windows has also been
proven to be a reliable and easy to use operating
system.

6. Advantages of a Mac OS
 Mac OS X has several advantages over
Windows. These include:
-Mac OS X's Aqua UI takes up less
system resources than Windows's Aero
UI.
-Mac OS X has better security (though
it's by obscurity) than Windows and you
are much less likely to get your Mac
infected than a PC.
-Mac OS X has a simple, easy-to-use
interface perfect for Technophobics,
Kids, and Geeks alike. It's easy enough
for the home user, and powerful enough
for the programmers.