Post on 25-Dec-2015
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Chapter 4System Software
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Presentation Overview
• The Function of System Software
• The Function of the Operating System
• Software User Interfaces
• Personal Computer Operating Systems
• Server Operating Systems
• Operating Systems for Handheld Devices
• Utility Programs and Translators
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The Function of System Software
What is the function of system software?
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The Function of System Software
What is the function of system software?– tells computer what to do and how to do it
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The Function of System Software
What is the function of system software?– tells computer what to do and how to do it– issues instructions to perform actions in a certain
order, allowing hardware to process data into information
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The Function of System Software
Two Categories of Software–Application software includesprograms that perform one task –System software controls the operations of a computer system
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The Function of the Operating System
What is the function of the operating system?
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The Function of the Operating System
What is the function of the operating system?– manages main memory, or RAM
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The Function of the Operating System
What is the function of the operating system?– manages main memory, or RAM– configures and controls peripheral devices
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The Function of the Operating System
What is the function of the operating system?– manages main memory, or RAM– configures and controls peripheral devices– manages essential file operations
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The Function of the Operating System
What is the function of the operating system?– manages main memory, or RAM– configures and controls peripheral devices– manages essential file operations– monitors system performance
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The Function of the Operating System
What is the function of the operating system?– manages main memory, or RAM– configures and controls peripheral devices– manages essential file operations– monitors system performance– provides a user interface
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The Function of the Operating System
Commonly Used Operating Systems for Personal Computers
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The Function of the Operating System
Booting a computer is a series of steps that displays the OS desktop on the screen.
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The Function of the Operating System
Managing Memory
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The Function of the Operating System
Managing Memory– Throughput – a measure of computer’s performance
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The Function of the Operating System
Managing Memory– Throughput – a measure of computer’s performance– Buffers – hold information and data waiting to
be transferred from input or output device
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The Function of the Operating System
Managing Memory– Throughput – a measure of computer’s performance– Buffers – hold information and data waiting to
be transferred from input or output device– Print spooling – holds document in buffer until
ready to be printed
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The Function of the Operating System
Managing Memory– Throughput – a measure of computer’s performance– Buffers – hold information and data waiting to
be transferred from input or output device– Print spooling – holds document in buffer until
ready to be printed– Multitasking – working on two or more applications
at the same time
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The Function of the Operating System
Managing Memory
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The Function of the Operating System
Managing Memory– Driver enables the operating system to communicate
with a peripheral device, such as a keyboard, monitor, mouse, modem, printer, or disk drive.
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The Function of the Operating System
Managing Memory– Driver enables the operating system to communicate
with a peripheral device, such as a keyboard, monitor, mouse, modem, printer, or disk drive.
– File manager maintains a record of all stored files and their locations, allowing a user to quickly locate and retrieve files.
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The Function of the Operating System
Managing Memory– Driver enables the operating system to communicate
with a peripheral device, such as a keyboard, monitor, mouse, modem, printer, or disk drive.
– File manager maintains a record of all stored files and their locations, allowing a user to quickly locate and retrieve files.
– Performance monitor checks the computer system’s speed and efficiency, as well as performance of CPU, memory, and storage disks.
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Software User Interfaces
Command line interfaces require users to type a line of code at a prompt telling the computer what to do.
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Software User Interfaces
Graphical user interfaces use pictures or text symbols (icons) to stand for complex commands.
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Software User Interfaces
Graphical User Interfaces
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Software User Interfaces
Graphical User Interfaces– Desktop – screen on which graphical elements are
displayed
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Software User Interfaces
Graphical User Interfaces– Desktop – screen on which graphical elements are
displayed– Display window – area of the screen used to
display a program or data
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Software User Interfaces
Graphical User Interfaces– Desktop – screen on which graphical elements are
displayed– Display window – area of the screen used to
display a program or data– Menu – set of options that can be activated with
the click of a mouse
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Software User Interfaces
Graphical User Interfaces– Desktop – screen on which graphical elements are
displayed– Display window – area of the screen used to
display a program or data– Menu – set of options that can be activated with
the click of a mouse– Common command icons – common actions
such as opening, saving, or printing files
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Personal Computer Operating Systems
Windows Operating System
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Personal Computer Operating Systems
Windows Operating System
– Windows 2000 Professional – used for business and network computers
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Personal Computer Operating Systems
Windows Operating System
– Windows 2000 Professional – used for business and network computers
– Windows XP Professional – designed for fast, powerful computers with much memory and hard disk space
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Personal Computer Operating Systems
Windows Operating System
– Windows 2000 Professional – used for business and network computers
– Windows XP Professional – designed for fast, powerful computers with much memory and hard disk space
– Windows Vista – improves security, helps diagnose and repair system problems, and makes networking easier
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Personal Computer Operating Systems
Macintosh Operating System
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Personal Computer Operating Systems
Macintosh Operating System
– Mac OS – has impressive graphics and ease of use
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Personal Computer Operating Systems
Macintosh Operating System
– Mac OS – has impressive graphics and ease of use– Mac OS 9 – better speech recognition, supports
files up to 2 terabytes, provides for many users, allows file encryption, and supports voice-entered passwords
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Personal Computer Operating Systems
Macintosh Operating System
– Mac OS – has impressive graphics and ease of use– Mac OS 9 – better speech recognition, supports
files up to 2 terabytes, provides for many users, allows file encryption, and supports voice-entered passwords
– Mac OS X – uses UNIX operating system foundation
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Personal Computer Operating Systems
IBM OS/2 – runs programs written for DOS and Windows
systems– used mainly for business applications
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Personal Computer Operating Systems
IBM OS/2 – runs programs written for DOS and Windows
systems– used mainly for business applications
Linux– an open-source software program (programming
code is free to the public)– praised for stability, flexibility, security, low cost
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Server Operating Systems
Novell Netware
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Server Operating Systems
Novell Netware
– widely used for local area networks
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Server Operating Systems
Novell Netware
– widely used for local area networks– allows retrieval or saving of files from server’s
shared hard disk
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Server Operating Systems
Novell Netware
– widely used for local area networks– allows retrieval or saving of files from server’s
shared hard disk– prints using a shared printer
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Server Operating Systems
Novell Netware
– widely used for local area networks– allows retrieval or saving of files from server’s
shared hard disk– prints using a shared printer– allows working off line as if on a stand-alone
personal computer
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Server Operating Systems
Windows
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Server Operating Systems
Windows
– Windows 2000 Server – Datacenter Server can support up to 23 processors and 64 gigabytes of data
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Server Operating Systems
Windows
– Windows 2000 Server – Datacenter Server can support up to 23 processors and 64 gigabytes of data
– Windows 2003 Server – Standard Edition intended for small- to medium-sized business; Datacenter Edition supports multiple servers
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Server Operating Systems
Windows
– Windows 2000 Server – Datacenter Server can support up to 23 processors and 64 gigabytes of data
– Windows 2003 Server – Standard Edition intended for small- to medium-sized business; Datacenter Edition supports multiple servers
– Windows Longhorn Server – has Windows Vista benefits and offers server-specific tools, protocols, and utilities for network management
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Server Operating Systems
UNIX and Linux
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Server Operating Systems
UNIX and Linux
– UNIX – a cross-platform system that runs any type of computer from PC to supercomputer
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Server Operating Systems
UNIX and Linux
– UNIX – a cross-platform system that runs any type of computer from PC to supercomputer
– Linux – an open-source software program designed for use with servers and large computer systems, including midrange servers and mainframes
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Operating Systems for Handheld Devices
Palm OSprovides a graphical user interface used in various versions of Palm PDAs, Sony PDAs, and smartphones
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Operating Systems for Handheld Devices
Palm OSprovides a graphical user interface used in various versions of Palm PDAs, Sony PDAs, and smartphones
Windows Mobileused in wireless devices and other systems with embedded processors, such as smartphones and PocketPC PDAs
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Utility Programs and Translators
Utility programs and their functions
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Utility Programs and Translators
Utility programs and their functions (continued)
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Utility Programs and Translators
Utility programs and their functions (continued)
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Utility Programs and Translators
Firewalls prevent unauthorized users from accessing a personal computer or network connected to the Internet.
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UtilityProgramsandTranslators Shown is a simple payroll program written in DOS BASIC.
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On the Horizon
Based on the information presented in this chapter and your own experience, what do you think is on the horizon?