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Copyright 2003 The McGraw-Hill Companies, Inc.
1
33CH
AP
TE
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System Software
computing ESSENTIALS
Copyright 2003 The McGraw-Hill Companies, Inc.
2
Competencies
System software
Function of operating systems
Categories of operating systems
Utilities
Device drivers
Language translators
computing ESSENTIALS
Copyright 2003 The McGraw-Hill Companies, Inc.
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Systems Software
Handles technical details without user intervention
Collection of programs Operating system Utilities Device drivers Language translators
computing ESSENTIALS
Copyright 2003 The McGraw-Hill Companies, Inc.
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Operating Systems
Basic functions
Manage resources
Provide user interface
Run applications
computing ESSENTIALS
Copyright 2003 The McGraw-Hill Companies, Inc.
5
Operating System Categories
Many different operating systems
Three basic categories
Embedded
Network
Stand-alone
computing ESSENTIALS
Copyright 2003 The McGraw-Hill Companies, Inc.
6
Embedded Operating System
Used in handheld computers
Stored within device in Read-Only Memory
Example
Windows CE
Palm OS
computing ESSENTIALS
Copyright 2003 The McGraw-Hill Companies, Inc.
7
Network Operating System
Controls and coordinates linked computers Network Server
Coordinates communication with other computers
Example Novell NetWare Windows NT Server UNIX
computing ESSENTIALS
Copyright 2003 The McGraw-Hill Companies, Inc.
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Stand-Alone Operating System
Desktop operating system Controls a single desktop or
laptop computer Can be part of network
Works with network’s NOS Client operating system
Example Windows XP, MacOS
computing ESSENTIALS
Copyright 2003 The McGraw-Hill Companies, Inc.
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Microsoft Windows Most popular OS for
microcomputers Designed for Intel
processors Active Desktop
Graphical user interface to OS
Windows XP, Windows 2000
Windows CE
computing ESSENTIALS
Copyright 2003 The McGraw-Hill Companies, Inc.
10
Apple MacOS
Runs on Macintosh computers
Designed for PowerPC microprocessors
OS X Latest version OS Aqua Dock Sherlock
computing ESSENTIALS
Copyright 2003 The McGraw-Hill Companies, Inc.
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UNIX Originally ran on mainframe
and minicomputers
Used for large servers on
the Web
Popular alternative to
Windows
Several versions available
Solaris 8
Linux
computing ESSENTIALS
Copyright 2003 The McGraw-Hill Companies, Inc.
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Utilities
Specialized programs for system
maintenance
Fix system problems
Increase system efficiency
Protect system
computing ESSENTIALS
Copyright 2003 The McGraw-Hill Companies, Inc.
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Essential Utilities
Troubleshooting
Antivirus
Uninstall
Backup
File compression
computing ESSENTIALS
Copyright 2003 The McGraw-Hill Companies, Inc.
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Windows Utilities
Accessed from System Tools menu Backup
Copy all or selected files Disk Cleanup
Identifies and removes unused files Disk Defragmenter
Locates and eliminates file fragments
computing ESSENTIALS
Copyright 2003 The McGraw-Hill Companies, Inc.
15
Utility Suites
Bundle several utility
programs into one
package
Norton
SystemWorks
McAfee Office
eSafe Desktop
computing ESSENTIALS
Copyright 2003 The McGraw-Hill Companies, Inc.
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Device Drivers
Allow devices to communicate with
computer system
Loaded into memory at system start-up
New devices require new device driver
Drivers provided with operating system or
from device manufacturer
Download from Web site
computing ESSENTIALS
Copyright 2003 The McGraw-Hill Companies, Inc.
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Language Translators
Translate programming language into machine language Words into 0’s and 1’s
Programming languages C++, C# Perl Visual Basic Java
computing ESSENTIALS
Copyright 2003 The McGraw-Hill Companies, Inc.
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A Look to the Future
IBM concentrating research efforts on eLiza
Handle time-consuming maintenance
Autonomic computing
Self-maintaining
Self-repairing
Self-updating
computing ESSENTIALS
