1. Operating System and Utility Programs
Chapter 7
Operating System and Utility Programs
Copyright©2008 N.AlJaffan®KSU

2. Operating System and Utility Programs
Chapter 7
System Software consists of the programs that control or maintain the operations of the computer and its devices.
It serves as the interface between the user, the application software, and the computer’s hardware.
Two types of system software :
Operating system
Utility program
Copyright©2008 N.AlJaffan®KSU

3. Operating System and Utility Programs
Chapter 7
Operating System ( OS ), platform
Is a set of programs containing instructions that coordinate all the activities among computer hardware resources.
In most cases, the OS is installed and resides on the computer’s hard disk.
On handheld computers and many mobile devices, the OS may reside on a ROM chip.
Copyright©2008 N.AlJaffan®KSU

4. Operating System and Utility Programs
Chapter 7
Operating System ( OS ), platform
Different sizes of computers typically use different operating systems.
The application software designed for a specific operating system may not run when using another OS.
Copyright©2008 N.AlJaffan®KSU

5. Operating System and Utility Programs
Chapter 7
Providing a User Interface
You interact with software through its user interface.
User interface controls how you enter data and instructions and how information is displayed on the screen.
2 types of user interfaces are
Command-line interfaces.
Graphical user interfaces.
Copyright©2008 N.AlJaffan®KSU

6. Operating System and Utility Programs
Chapter 7
Providing a User Interface
Command-line interfaces
User types commands or presses special keys on the keyboard to enter data and instruction.
Its difficult to use because they require exact spelling, grammar and punctuation.
Its give a user more control to manage detailed settings.
Copyright©2008 N.AlJaffan®KSU

7. Operating System and Utility Programs
Chapter 7
Copyright©2008 N.AlJaffan®KSU

8. Operating System and Utility Programs
Chapter 7
Providing a User Interface
Graphical user interfaces GUI
You interact with menus and visual images such as buttons and other graphical objects to issue commands.
Most users today work with it.
Copyright©2008 N.AlJaffan®KSU

9. Operating System and Utility Programs
Chapter 7
Managing Programs
Single user/single tasking OS allows only one user to run one program at a time.
PDAs, smart phone, and other small computing device often use a single user/single tasking OS.
Single user/multitasking OS allows a single user to work on two or more programs that reside in memory at the time.
Copyright©2008 N.AlJaffan®KSU

10. Operating System and Utility Programs
Chapter 7
Managing Programs
Multiuser OS enables 2 or more user to run programs simultaneously.
networks, servers, mainframes and supercomputers allow hundreds to thousands of users to connect at the same time.
Multiprocessing OS supports 2 or more processors running programs at the same time.
Copyright©2008 N.AlJaffan®KSU

11. Operating System and Utility Programs
Chapter 7
Types of OS
There are 3 basic categories of OS that exist today
Stand-alone Is a complete OS that works on a desktop computer, notebook computer, or mobile computing device. Some of them OS include networking capabilities
Network Typically resides on a server.
Embedded OS on most PDAs and small devices. Typically resides on a ROM chip
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12. Operating System and Utility Programs
Chapter 7
Types of OS
Stand-alone
DOS versions of DOS were PC-DOS and MS-DOS
Windows 3.x , Windows 95, Windows NT workstation, Windows 98, Windows 2000 Professional, Windows Millennium edition.
Windows XP.
Windows Vista.
Mac OS X
UNIX
Linux
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16. Operating System and Utility Programs
Chapter 7
Types of OS
Network
NetWare
Windows NT server, Windows 2000 Server
Windows Server 2003
UNIX
Linux
Solaris , version of UNIX developed by sun Microsystems designed specifically for e-commerce application.
Often are called multipurpose OS
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17. Operating System and Utility Programs
Chapter 7
Types of OS
Embedded
Windows CE
Windows Mobile
Palm OS
Embedded Linux
Symbian OS is an Open source multitasking OS designed fore smart phone
Copyright©2008 N.AlJaffan®KSU