Professor Michael J. Losacco CIS 1110 – Using Computers Operating Systems & Utility Programs Chapter 7

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

Chapter7 3/30 Systems Software Control Operation of Computer Types Operating System (OS) Utilities

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

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

Chapter7 6/30 Booting Starting / Restarting Computer Cold Boot Turning on Computer from Off State Warm Boot Restarting Computer that is Already On

Chapter7 7/30 Booting Mechanics

Chapter7 8/30 Booting Boot Drive Drive From Which Computer Starts Boot Disk Contains System Files Recovery Disk Return System to Original Purchase State

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

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

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

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

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

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

Chapter7 15/30 Scheduling Spooling Send Print Jobs to Buffer Instead of Directly to Printer Print Jobs Line up in Queue

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

Chapter7 17/30 Connectivity Provides Means To Establish: Internet Connections Network Connections

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

Chapter7 19/30 OS Categories

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

Chapter7 21/30 Stand-alone Microsoft Windows 7 Apple First Commercially Successful GUI Mac OS X Unix Linux Open-source Unix

Chapter7 22/30 Server Microsoft Windows Server 2008 Unix Linux Solaris Unix-like by Sun Microsystems Novell Netware

Chapter7 23/30 Embedded Found on Small Devices Resides on a ROM chip Android Blackberry iPhone Palm Windows Mobile

Chapter7 24/30 Utility Programs Performs Maintenance-type Tasks

Chapter7 25/30 Utility Programs Backup / Restore Uninstaller Remove Main Program & Support Files Disk Cleanup Removes Unnecessary Files

Chapter7 26/30 Utility Programs Disk Defragmenter Reorganizes Files Faster Execution File Compression AKA Zipped Files Shrinks Size of Files Faster Communication

Chapter7 27/30 Utility Programs Image Viewer Display, Copy, Print Graphics Files Screen Saver Shows Moving Image If No Activity Occurs for Specified Time

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

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

Chapter7 30/30 Utility Programs Media Player View Images & Animation Listen to Audio Watch Video Files CD/DVD Burning Writes to Recordable / Rewriteable Disks