Chapter 7 Operating Systems and Utility Programs

Today Systems Software v 3 types of Operating Systems v 10 functions of the operating system v 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? Next p Operating system (OS) (sometimes called the platform) coordinates all activities among computer hardware resources Programs that control operation of computer Two types are operating systems and utility programs

The Operating Systems Next p 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? Next p. 251 Fig 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? Next p. 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 interface What 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? Next p 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 Next p. 255  With virtual memory (VM), portion of hard disk is allocated to function as RAM

5) Scheduling jobs Next p. 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 devices What is a driver? Next p. 256 Driver Program that tells operating system how to communicate with device With Plug and Play, operating system automatically configures new devices as you install them Click to view Web Link, click Chapter 7, Click Web Link from left navigation, then click Plug and Play below Chapter 7

Operating System Functions 6) Establishing an Internet Connection How do you establish an Internet connection? Next p 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? Next p. 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? Next p. 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? Next p 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-Virus Programs Web Filters Anti-Spam Programs

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 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 ed 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?