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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?