OPERATING SYSTEM

Group members

NAME ID SECTION

AHMED FAYZ 11-19719-3 A4

ABU NASER 11-19649-3 A4

RAHMAN MUNIA 11-19702-3 A4

SHARMIN NAIMA 11-19640-3 A4

What is Operating System?

• An operating system is an interface between the

hardware of a computer

• Is a software, which makes a computer to actually work.

• Enables all the programs we use.

• Organizes and controls the hardware.

• Acts as an interface between the application programs and the machine hardware.

• Examples: Windows, Linux, Unix and Mac OS, etc.,

Windows 7

OS produced by Microsoft

Released on july 22,2009

It has many versions .

Linux OS produced by

Linux Torvalds Released on

October 5, 1991 Command types

OS.

Mac os

OS produced by Apple

first introduced in 1984

Very old operating system .

The functions of an operating system

1. Manages and Interacts with Computer Hardware

2. Provides and Manages System Security

3. Displays the on screen element with which user interact

4. Provides the Interface for Application Software

5. Organized file storage (how data will store)

6. Run programs

Operating system(OS)

User and applications depend on the OS to relate to all hardware components

Types of Operating system

• Operating systems have 4 types

1. Real time OS : fast and small OS , response quickly, run real time applications. Ex: Music player ,Medical devices .

2. Single user/Single tasking OS: Allow a single user to perform Can do Just one task at a time. Get input by using functions. Ex: MS-DOS.

Types of Operating system

3. Single user/Multitasking OS: Allow a single user to perform. Perform two or more function at once. Most commonly used in personal computers. Ex: Windows Xp.

4. Multi user/Multitasking OS: Allow multiple users to use programs. Requires a high configured pc Maintenance can be easy. Ex: UNIX

System Interface• System interface is the interface between the user and

the computerThere are 2 interface 1. Command Line Interface (CLI): Older interface User have to types commands DOS, Linux, UNIX 2. Graphical User Interface (GUI): Most common interface Have a graphical representation Windows 7,Xp.

Uses of operating systems

Windows 7 Windows Xp Windows Vista

Mac os Linux05

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43.1238.48

9.45.4 3.6

persentags

persentags

• Dos A command line interface OS. Has no graphical representation. Compatible market between 1981 and 1995. Very little uses.

Windows 95Graphical user interface based OS. First released OS of Microsoft. Introduced 32 bit OSUser can do many things by this OS

Windows 98 The second major release in the windows 9X Many improvement of hardware support . Improvements to the system. Make some edition of windows.

Windows xp Mostly used on personal computers Added the first user switching Graphics subsystem and improved image

management comes with many numbers of new features security system is very good

Windows vista a large number of new application

programming interfaces. primary design is very good. Added new internet explorer 7 Did not get well in market.

Windows 7 Latest release of Microsoft Introduced a large number of new features Start menu and taskbar improvement It focused on multi touch support. A great graphical representation .

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