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Professor Michael J. Losacco CIS 1110 – Using Computers Operating Systems & Utility Programs Chapter 7
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Chapter7 2/30 Overview Define System Software Identify the Types of Systems Software Describe Operating System Functions Summarize the PC Startup Process Identify Types of Operating Systems Explain the Purpose of Utilities
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Chapter7 3/30 Systems Software Control Operation of Computer Types Operating System (OS) Utilities
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Chapter7 4/30 Operating System Set of Programs Coordinates Hardware Resources For All Computer Activities Allows Use of Application Software Cross-platform Applications Identical on Multiple Operating Systems
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Chapter7 5/30 Operating System Functions administer security start computer manage memory monitor performance control a network provide user interface provide file management establish communications schedule jobs & configure devices manage programs
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Chapter7 6/30 Booting Starting / Restarting Computer Cold Boot Turning on Computer from Off State Warm Boot Restarting Computer that is Already On
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Chapter7 7/30 Booting Mechanics
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Chapter7 8/30 Booting Boot Drive Drive From Which Computer Starts Boot Disk Contains System Files Recovery Disk Return System to Original Purchase State
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Chapter7 9/30 Modes Sleep Saves Open Docs / Programs to RAM Turns Off All Unneeded Functions Places Computer in a Low-power State Hibernate Saves Open Docs / Programs to Disk Removes Power from Computer
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Chapter7 10/30 User Interface (UI) Controls How Data is Entered Determines How Information Displays Command-line Typed Commands Graphical User Interface (GUI) Uses Visuals Such as Icons & Menus Represents: Program Instruction
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Chapter7 11/30 Program Management Multitasking Work on Multiple Applications at Once Foreground Active Application Background Programs that are Running in Memory Not Currently in Use
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Chapter7 12/30 Program Management Multiuser Two or More Users Run Same Program Simultaneously Multiprocessing Multiple CPUs Running at Same Time Fault-tolerant Duplicate Components Hard Disk, Memory Can Operate Even if Component Fails
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Chapter7 13/30 Memory Management Optimizes the Use of RAM Allocates Memory for Processing Data Monitors Contents Clears Memory When Not Required Virtual Memory Part of Hard Disk Functions as RAM Thrashing
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Chapter7 14/30 Scheduling Job Operation the Processor Manages Receiving Data from Input Device Transfer Items Between Storage & Memory Processing Instructions Sending Information to Output Device Adjusts Schedule Based on Job’s Priority
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Chapter7 15/30 Scheduling Spooling Send Print Jobs to Buffer Instead of Directly to Printer Print Jobs Line up in Queue
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Chapter7 16/30 Device Drivers How to Communicate with Device Each Device Requires its Own Driver Plug and Play OS Automatically Configures New Device Recognizes When Installed
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Chapter7 17/30 Connectivity Provides Means To Establish: Internet Connections Network Connections
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Chapter7 18/30 File Management Windows Explorer (My Computer) Tree Structure Documents & Files Folders & Subfolders Paths Maintenance Copy, Move, Rename, Delete Startup Folder Temporary Files
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Chapter7 19/30 OS Categories
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Chapter7 20/30 Stand-alone Complete OS that Works on: Desktop Computers Notebook Computers Mobile Computing Devices Market Share Microsoft Windows92% Apple Macintosh 6% Linux 1% NetMarketShare 4/12
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Chapter7 21/30 Stand-alone Microsoft Windows 7 Apple First Commercially Successful GUI Mac OS X Unix Linux Open-source Unix
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Chapter7 22/30 Server Microsoft Windows Server 2008 Unix Linux Solaris Unix-like by Sun Microsystems Novell Netware
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Chapter7 23/30 Embedded Found on Small Devices Resides on a ROM chip Android Blackberry iPhone Palm Windows Mobile
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Chapter7 24/30 Utility Programs Performs Maintenance-type Tasks
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Chapter7 25/30 Utility Programs Backup / Restore Uninstaller Remove Main Program & Support Files Disk Cleanup Removes Unnecessary Files
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Chapter7 26/30 Utility Programs Disk Defragmenter Reorganizes Files Faster Execution File Compression AKA Zipped Files Shrinks Size of Files Faster Communication
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Chapter7 27/30 Utility Programs Image Viewer Display, Copy, Print Graphics Files Screen Saver Shows Moving Image If No Activity Occurs for Specified Time
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Chapter7 28/30 Utility Programs Antivirus Prevents, Detects, & Removes Viruses Must be Updated Frequently Spyware / Adware Remover Detects & Deletes Spyware / Adware Firewall Detects Unauthorized Intrusions
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Chapter7 29/30 Utility Programs Filters Block Items from Being Displayed Web Anti-spam Phishing Pop-up Blockers Computer Maintenance Identify & Fix OS & Disk Problems Some Continuously Monitor Computer
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Chapter7 30/30 Utility Programs Media Player View Images & Animation Listen to Audio Watch Video Files CD/DVD Burning Writes to Recordable / Rewriteable Disks
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