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Transcript of 3 3 3 CHAPTER System Software. 3 © The McGraw-Hill Companies, Inc. 2002 Objectives System software...
© The McGraw-Hill Companies, Inc. 2002
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Objectives Objectives
• System software
• Programs, Functions, Categories
• Utilities
• Device drivers
• Language translators
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Systems SoftwareSystems Software
• Behind the scenes activities
• Designed to handle– Technical details– Where programs stored– How commands executed– Where files saved– How output handled
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Four Kinds of ProgramsFour Kinds of Programs
• Operating system
• Utilities
• Device drivers
• Language translators
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Operating SystemsOperating Systems
–Coordinates resources
–Provides user interface
–Run applications
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Categories of OSCategories of OS
• Hundreds of operating systems
• Three basic categories
– Embedded – hand-held
– Network OS – linked computers
– Stand-alone OS – desktop
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Major OSMajor OS
• Windows – 80% of market• Mac OS – powerful and easy to use• UNIX – network; originally designed
for Web• LINUX – non proprietary; free off
Web
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UtilitiesUtilities
– Hard disk crashes
– Antivirus programs
– Computer freeze-ups
– Decrease operation slow-downs
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Essential UtilitiesEssential Utilities
• Troubleshooting
• Antivirus
• Uninstall
• Backup
• File compression
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Utility SuitesUtility Suites
• Norton• McAfee• DataFellows
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Device driversDevice drivers
• Specialized programs
• Loaded into memory each time
• Add new device: install device driver
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A Look to the FutureA Look to the Future
• IBM concentrating research efforts
on eLiza:
– Handle time-consuming maintenance
– Create complex infrastructure
• Self-maintaining servers
– Able to care for themselves