Transcript Chapter 7
Operating System and Utility Programs Copyright©2008 N.AlJaffan®KSU 1 Operating System and Utility Programs System Software consists of the programs that control or maintain the operations of the computer and its devices. Two types of system software : Operating system Utility program Copyright©2008 N.AlJaffan®KSU 2 Operating System and Utility Programs Operating System ( OS ), platform Is a set of programs containing instructions that coordinate all the activities among computer hardware resources. 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 3 Operating System and Utility Programs 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 4 Operating System and Utility Programs 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 5 Operating System and Utility Programs 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 6 Operating System and Utility Programs 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 7 Operating System and Utility Programs Managing Programs Single user/single tasking OS allows only one user to run one program at a time. Small computing device often use a single user/single tasking OS. Single user/multitasking OS allows a single user to user to work on two or more programs that reside in memory at the time. Copyright©2008 N.AlJaffan®KSU 8 Operating System and Utility Programs Managing Programs Multiuser OS enables 2 or more user to run programs simultaneously. Multiprocessing OS supports 2 or more processors running programs at the same time. Copyright©2008 N.AlJaffan®KSU 9 Operating System and Utility Programs 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 Copyright©2008 N.AlJaffan®KSU 10 Operating System and Utility Programs Types of OS Stand-alone DOS versions of DOS were PCDOS and MS-DOS Windows 3.x , Windows 95, Windows NT workstation, Windows 98, Windows 2000 Professional, Windows Millennium edition. Copyright©2008 N.AlJaffan®KSU Windows XP. Windows Vista. Mac OS X UNIX Linux 11 Copyright©2008 N.AlJaffan®KSU 12 Copyright©2008 N.AlJaffan®KSU 13 Copyright©2008 N.AlJaffan®KSU 14 Operating System and Utility Programs Types of OS Network NetWare Windows NT server, Windows 2000 Server Windows Server 2003 UNIX Linux Often are called multipurpose OS Solaris , version of UNIX developed by sun Microsystems designed specifically for e-commerce application. Copyright©2008 N.AlJaffan®KSU 15 Operating System and Utility Programs 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 16