System Software Chapter 5

5-2 Handles technical details Works with end users, application software, and computer hardware Four types of programs –Operating system –Utilities –Device drivers –Language translators System Software

5-3 Manage computer resources Provide an interface between the users and computer Runs applications A collection of programs that handle technical tasks Every computer has an operating system Operating Systems

5-4 Performs three types of functions –Manages computer resources Coordinate memory, processing storage, and printers Monitor system performance Provide security Start-up the computer –Provides user interface Character-based interface Graphical user interface (GUI) –Runs applications Multitasking Foreground & background applications Functions of an Operating System

5-5 Booting Features in common with application software –Icons –Pointers –Windows –Menus –Dialog boxes –Help Features of an Operating System

5-6 Hundreds of operating systems Three basic categories –Embedded operating systems – hand-held –Network operating systems – linked computers –Stand-alone operating systems – desktop Categories of Operating Systems

5-7 OS often called software environment or platform Operating systems commonly used by individuals –Windows – most widely usedWindows –Mac OS – powerful and easy to useMac OS –UNIX – network; originally designed for WebUNIX –LINUX – non proprietary; free from the WebLINUX More on Operating Systems

5-8 The most popular microcomputer operating system – over 90 percent of the market Comes in a variety of different versions Windows Vista provides several improvements over Windows XP. Windows Return

5-9 An operating system designed to run on Apple computers Not used as widely as Windows One of the most innovative operating systems Mac OS X is one of the latest versions Mac OS, Leopard allows the running of both the Mac OS and Windows Mac OS Return

5-10 UNIX operating system –Originally designed to run on minicomputers on a network –Used by powerful microcomputers LINUX is a version of UNIX –Not proprietary –Open source UNIX and LINUX

5-11 Specialized programs to make computing easier Most essential utilities –Troubleshooting or diagnostic programs –Antivirus programs –Uninstall programs –Backup programs –File compression programs Utilities

5-12 Backup Disk Cleanup Disk Defragmenter Windows Utilities Accessing Windows Vista utilities: Click Start, Select All Programs, Select Accessories, Choose System Tools

5-13 Utility program included with many Windows versions Makes a copy of all files or selected files that have been saved on a disk Helps prevent against disk failure Backup Return

5-14 Identifies and eliminates nonessential files Frees up valuable space and improves system performance Disk Cleanup Return

Disk Defragmenter Identifies and eliminates unnecessary fragments Rearranges files and unused disk space to optimize operations Speeds up file access 5-15

5-16 A group of several utility programs bundled for sale Buying the package is economical Popular suites –Norton System Works –McAfee Office –V Communications SystemSuite Utility Suites

5-17 Specialized programs that allow communication between a device and the computer Loaded into memory each time a computer is started When a new device is added, new device drivers must be installed Device Drivers

5-18 Are known as mobile OS (operating system). Are types of embedded operating system Every Smartphone has a mobile phone operating system. These system are less complicated and more specialized for wireless communication than desktop operating system. Mobile Phone Operating system

5-19 While there are numerous mobile phone operating system, some of the best known as Symbian, BlackBerry OS, iPhone OS, Android, and windows Phone 7. Symbian: »Symbian originated in Japan with Nokia, Sony, and others. »It controls more Smartphones worldwide than any other mobile OS. BlackBerry OS: »BlackBerry OS (RIM OS) originated in Canada. »It was designed as the platform for BlackBerry handheld computers Mobile Phone Operating system

5-20 iPhones OS: »iPhone OS was developed by Apple to support iPhone, iPod Touch, and iPad. »It is one of the fastest growing mobile OS. Android: »Android was originally developed by Android Inc and later purchased by Google. »It is one of the fasted growing mobile OS. Windows Phone 7 »Microsoft Windows Phone 7 followed Windows CE and Windows Mobile. »It is designed for social networking and instant messaging. Mobile Phone Operating system

Virus Protection and Internet Security Internet Security Suite –Runs a number of programs –Continually monitors your computer VirusScan –Controls the frequency of searches for viruses –Quarantines or deletes infected files PrivacyService –Helps protect your privacy online –Block websites, cookies, and ads