This is a document that shows important details about OS.

1. Group # 4

2. History of Operating Systems
• In 1945-1955 the operating systems was invented
• Historically operating systems have been tightly related to
the computer architecture.
• Operating systems have evolved through a number of
distinct phases or generations which corresponds roughly
to the decades.
• For ten years there has been a war between the operating
system of a PC and a Mac operating system.

3. General facts about Operating system
• It is the most
important program that runs
on a computer.
• It is a set of programs that
manage computer hardware
resources and provide
common services
for application software.
• It is a vital component of
the system software in a
computer system.

4. Definition
• The most important software
program on any computer. It
manages the computer's
memory, processes, and all of
its software and hardware. It
also allows you to
communicate with the
computer without knowing
how to speak the computer's
"language." Without an
operating system, a computer
is useless.

5. Parts of an Operating System
The operating system comprises a set of
software packages that can be used to
manage interactions with the hardware.
The following elements are generally
included in this set of software:
• The kernel, which represents the
operating system's basic functions such
as management of memory, processes,
files, main inputs/outputs and
communication functionalities.
• The shell, allowing communication with
the operating system via a control
language, letting the user control the
peripherals without knowing the
characteristics of the hardware used,
management of physical addresses, etc.
• The file system, allowing files to be
recorded in a tree structure.

6. Examples of Operating Systems
• Windows
• Linux
• Unix
• Mac OS

7. Functions of an Operating System
• Organize and manage computer hardware.
• Give the user the ability to
communicate with the computer

8. Types of operating systems
As computers have progressed and developed so have the operating systems. Below is
a basic list of the different operating systems and a few examples of operating systems
that fall into each of the categories. Many computer operating systems will fall into
more than one of the below categories.
• GUI - Short for Graphical User Interface, a GUI Operating System contains graphics
and icons and is commonly navigated by using a computer mouse. See the GUI
definition for a complete definition. Some examples of GUI Operating Systems are:
• System 7.x
• Windows 98
• Windows CE
• Multi-user - A multi-user operating system allows for multiple users to use the
same computer at the same time and different times. See the multi-user definition
for a complete definition for a complete definition. Some examples of multi-user
operating systems are:
• Linux
• Unix
• Windows 2000

9. Types of Operating Systems
• Multiprocessing - An operating system capable of supporting and utilizing more than one
computer processor. Some examples of multiprocessing operating systems are :
• Linux
• Unix
• Windows 2000
• Multitasking - An operating system that is capable of allowing multiple software processes to
run at the same time. Some examples of multitasking operating systems are:
• Unix
• Windows 2000
• Multithreading - Operating systems that allow different parts of a software program to run
concurrently. Some examples of this category are:
• Linux
• Unix
• Windows 2000

10. Software for an operating system
• A computing platform includes some sort of hardware
architecture and a software framework(includingaplication
frameworks). Typical platforms include a computer's
architecture operating system, programming languages and
related user interface.
• Different computer manufacturers use different operating
systems. Apple has specific operating systems. The most
common is Windows, which was developed by a company
named Microsoft.
• The operating systems can be of single user like Window or
multi-user like Solaris.

11. Examples of Operating Systems Software
are :
• AmigaOS, AmigaOS 4
• FreeBSD, NetBSD, OpenBSD
• Linux
• Mac OS X
• Microsoft Windows
• OS/2
• Solaris
• Unix
• IBM VM/370, VM/BSEP,
VM/SEP, VM/XA, VM/ESA,
z/VM
• Google Chrome OS

12. Video about Operating Systems
• It is a good idea about Buffalo Technology
because they are trying to get the very best
characteristics of PC and MAC. It is a compare
and contrast between the Mac´s OP and the
Pc´s OP ,searching for they disadvantages
and advantages of both, and looking for the
best OP.

13. Video about Operating Systems
This is a video about operating system by Dr. Murphy.
http://www.youtube.com/watch?v=MzVGL44eq9w