Computers Are Your Future Eleventh Edition Chapter 4: System Software Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall1

Software Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall2

System Software System software consists of all the programs that enable the computer and its peripheral devices to function smoothly. System software is divided into two main categories: The operating system System utilities (utility programs) 3Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall

The Operating System The operation system (OS) is a set of programs that coordinates: Hardware functions Interaction between application software and computer hardware Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall4

Five basic functions Starts the computer Manages applications Manages memory Handles input and output device messages Provides a user interface for communication Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall5 The Operating System

Exploring Popular Operating Systems Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall6 Operating SystemsMarket Share Windows XP60.55% Windows Vista22.64% Mac OSX7.11% Linux1.97% Windows 71.69% Windows % Windows % iPhone OSX0.40% Windows % WAP0.07%

Exploring Popular Operating Systems The most popular operating system Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall7 Microsoft Windows

Exploring Popular Operating Systems Microsoft Windows Vista Supports tablet PCs and other mobile devices Has new and improved features such as: Search Networking tools Integrated speech recognition Gadgets—applications that appear as icons Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall8

Exploring Popular Operating Systems Windows 8 is the latest version. Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall9 Microsoft Windows Windows 7.

Exploring Popular Operating Systems Microsoft Windows Server 2008 Used in corporate environments to support client/server systems Benefits include: Security Web server Administration Virtualization Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall10

Exploring Popular Operating Systems Microsoft Windows Mobile Designed for smartphones and PDAs Includes simplified versions of Windows programs Supports synchronizing with corresponding programs on desktop computers Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall11

Exploring Popular Operating Systems Mac OS Used on Macintosh personal computers simple to use Linux Is open source software, meaning the source code is available to users MS-DOS (DOS)Microsoft disk OS A command-line user interface OS Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall12

System Utilities: Housekeeping Tools System utilities (utility programs) Software programs that are essential to effective management of the computer system Perform tasks such as: Backing up files Providing antivirus protection Compressing files Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall13

System Utilities: Housekeeping Tools Backup software copies data found on the hard disk to a backup device. Full backups include all files and data. Incremental backups include only those files changed or added since the previous backup. Drive imaging software creates a mirror image of the entire hard drive. Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall14

System Utilities: Housekeeping Tools Antivirus software protects the computer from viruses. Popular antivirus programs: Norton AntiVirus McAfee VirusScan Plus AVG Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall15

System Utilities: Housekeeping Tools Searching for and managing files File manager is the utility software that organizes and manages data. Copy files Determine how and where files are stored Delete files A search utility enables you to locate files. Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall16

System Utilities: Housekeeping Tools Scanning and defragmenting disks Disk scanning programs find and resolve disk file storage problems. Disk cleanup utilities remove unnecessary files to save space. Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall17

System Utilities: Housekeeping Tools File compression utilities Decrease the size of files, resulting in faster downloads Create archives by storing files in a special format Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall18

System Utilities: Housekeeping Tools Systems Update Windows Update for Windows 7 and Vista automatically downloads and installs updates. It includes service packs, version upgrades, and security updates. Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall19

System Utilities: Housekeeping Tools Troubleshooting Keep a boot disk (emergency disk) to load the operating system during times of emergency. Use the Windows Help and Support utility. Shut down the system properly. Use correct procedure; don’t just turn the power off. Put in sleep mode, a lower-power state, as an alternative. Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall20