Chapter 7 Operating Systems and Utility Programs.

Chapter 7 Operating Systems and Utility Programs

Today

Systems Software 3 types of Operating Systems 10 functions of the operating system 8 utility functions

What are the 6 parts of the IT model?

1. Application Software Programs designed to make users more productive The reason to own a computer

2. Systems Software Programs that control the operations of a computer

– Operating system– Utilities

Software

the instructions that tell the computer what to do and how.

System Software

What is system software?

Nextp. 250 - 251

Operating system (OS)Operating system (OS) (sometimes called the platform) (sometimes called the platform)

coordinates all activities coordinates all activities among computer among computer

hardware hardware resourcesresources

Programs that Programs that control operation control operation

of computerof computer

Two types are Two types are operating systemsoperating systems

and and utility programsutility programs

The Operating Systems

Nextp. 262

1. Stand-alone Operating System• Windows XP• Windows Vista• Mac OS X• UNIX

2. Network Operating System• Windows Server• NetWare• Unix, Linux• Solaris

3. Embedded• PDA’s• Palm OS

Operating Systems

What are the functions of an operating system?

Nextp. 251 Fig. 7-1

10. administer

security

1. start the computer

4. manage memory

7. monitor performance

9. control a network

2. provide a user interface

3. manage programs

8. provide file management and other utilities

6. establish an Internet connection

5. schedule jobs and configure devices

1) Starting a computer

What is booting?

Nextp. 252 Fig. 7-2

Cold boot Turning on computer that has been powered off

Warm boot Restarting computer that is powered on

Process of starting or restarting a computer

2) Providing a user interfaceWhat is a user interface? Controls how you communicate with the computer

With a command-line interface, a user types all commands.

With a Graphical User Interface (GUI), a user interacts with icons and buttons

Foreground contains program you are using

Background contains programs that are running but are not in use

3)Managing Programs

What is multitasking?

Nextp. 253 - 254 Fig. 7-4

Working on two or more programs that reside in memory at same time

4) Managing Memory

Memory management is making the best use of RAM

Nextp. 255

With virtual memory (VM), portion of hard disk is allocated to function as RAM

5) Scheduling jobs

Nextp. 256 Fig. 7-5

Spooling is sending print jobs to buffer instead of directly to printer

Print jobs line up in queue

Operating System Functions

5) Configuring devicesWhat is a driver?

Nextp. 256

DriverDriverProgram that Program that

tells operating system tells operating system how to communicate how to communicate

with devicewith device

With With Plug and PlayPlug and Play, , operating system operating system

automatically configures automatically configures new devices as you new devices as you

install theminstall them

Click to view Web Link,click Chapter 7, Click Web Linkfrom left navigation, then click Plug and Play below Chapter 7

Operating System Functions

6) Establishing an Internet ConnectionHow do you establish an Internet connection?

Nextp. 256 - 257 Fig. 7-6

Windows XP includes New Connection Wizard Guides user through setting

up connection between computer and Internet

Operating System Functions

7) Monitoring Performance

How does an operating system monitor performance?

Nextp. 257

Provides program, called performance monitor, that assesses and reports information about system resources and devices

Operating System Functions

8) Providing File management and other Utilities

What is a utility program?

Nextp. 259 Fig. 7-8

System software that performs maintenance-type tasks Also called

utility

Operating System Functions

9) Controlling a Network

What is a network operating system?

Nextp. 257 - 258 Fig. 7-7

Allows users to share printer, Internet access, files, and programs on a network

10) Administers security by establishing user name and password for each user

Finish the paragraph…

“The most important thing I learned today about the operating system is that…?

This will be collected and count as your attendance grade for today.

Systems Software The programs that control the operations of a

computer

1. Operating system

2. Utilities

Remember that…

Utility programs

1. File manager

2. Image viewer

3. Personal firewall

4. Uninstaller

5. Disk Scanner

6. Disk Defragmenter

7. Diagnostic utility

8. Backup utility

9. Screen saver

Pop-up Blockers Anti-spyware

Anti-VirusPrograms

WebFilters

Anti-SpamPrograms

Situation…

Viruses are not harmless pranks — in 1999, the Melissa virus cost an estimated $80 million in damages. In May 2000, a virus called the Love Bug wreaked havoc worldwide. The virus, which targeted Microsoft Outlook users, arrived as an attachment to e-mail messages, often from what would appear to be a “trusted source,” with the subject line, “ILOVEYOU” (hence the virus’s name). When the attachment was opened, the virus sent itself to every name in the victim’s address book, overwrote files on the victim’s hard drive, directed the victim’s browser to a Web site that downloaded a program to steal the victim’s password, and then e-mailed the password to the virus’s author (who eventually was discovered and arrested).

Discuss

What is your opinion about computer viruses and people who create them?

What are the consequences for the individuals involved in writing and distributing computer viruses?

Who pays the cost for these pranks?

Let’s discuss

Microsoft is a large company that manufactures and sell computer software. They make many of the popular application software programs such as Word, Excel, PowerPoint, Outlook, and Windows. They have been targeted for criticism because of monopolistic business practices—both the U.S. Justice Department and the European Commission, among others, brought Microsoft to court for antitrust violations and software bundling.

What is your opinion about Microsoft as a monopoly? Is it good for business?, Consumers?, Computer developers?