1

Chap

ter 7

Operating System &

Utility Programs

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 2

System Software Chap

ter 7

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.

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.

3

Operating System ( OS ) platform

Chap

ter 7

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.

4

Providing a User InterfaceChap

ter 7

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.

5

Providing a User InterfaceCommand-line interfaces

Chap

ter 7

6

Command-line interfacesChap

ter 7

You interact with menus and visual images such as buttons and other graphical objects to issue commands.

Most users today work with it.7

Graphical user interfaces GUIChap

ter 7

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.

8

Managing ProgramsChap

ter 7

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 include networking capabilities

Network Typically resides on a server. Embedded OS on most PDAs and small

devices. Typically resides on a ROM chip9

Types of OSChap

ter 7

10

Types of OS Stand-aloneStand-alone

Windows XP.Windows XP. Windows Vista.Windows Vista. Mac OS XMac OS X

Chap

ter 7

NetWareNetWare Windows NT server, Windows 2000 ServerWindows NT server, Windows 2000 Server Windows Server 2003Windows Server 2003 UNIXUNIX LinuxLinux

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Types of OS Network Chap

ter 7

Often are called multipurpose OS

Windows CE Windows CE

Windows MobileWindows Mobile

Palm OSPalm OS

Embedded LinuxEmbedded Linux

12

Types of OS Embedded Chap

ter 7