Professor Michael J. LosaccoCIS 1150 – Computer Information Systems

Systems Software

Chapter 5

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Overview

Types of System Software

Operating System Functions and Features

User Interfaces

Device Drivers

Types of Operating Systems

File Management

Utilities

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Understanding System Software

Collection or System of Programs

Handles Technical Details of Computer

Types

Operating System (OS)

Utilities

Device Drivers

Language Translators

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Operating Systems

Group of Programs

Manages Computer Hardware Resources

Manage, Schedule, Coordinate Tasks

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Operating Systems

Allows Application Software to Work with CPUMultitasking

Switch Between Applications Running in Memory

MultiuserTwo or More Users Run Same Program

Real-Time (RTOS)Performs Repetitive Series of Tasks in Precise Time

Fault-tolerantDuplicate Components

Hard Disk, Memory

Can Operate Even if Component Fails

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Operating Systems

User Interface

Way User Interacts with Computer

Coordinate Memory, Processing, Storage

Virtual Memory

Borrow Drive Space When RAM Is Limited

Paging

Copy From RAM to Hard Drive

Thrashing

Excessive Paging

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Operating Systems

Device Driver (AKA Driver)

Allows Communication Between Device and OS

Plug and Play

Appropriate Drivers Automatically Installed

For Most Devices

Windows Update

Automatically Updates Drivers

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Operating Systems Categories

Embedded Operating Systems

Smartphones

Cable TV Tuner Boxes

Video Game Systems

Network Operating Systems

Control / Coordinate Networked Computers

Stand-alone Operating Systems

Control Single Computer

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Operating Systems Categories

Windows 10

Mac OS Sierra

UNIX

Linux

Chrome OS

Desktop Market ShareMicrosoft Windows 88.5%

Apple Macintosh 9.0%

Linux 2.1%NetMarketShare 12/17

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Operating Systems Categories

U.S. Smartphone OS Market Share

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Starting Your Computer

Booting Mechanics

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Windows Interface

DesktopProvides Access to Computer Resources

Icons

Taskbar

Start Menu

Pinning

Windows

TabDivide Menus into Major Activity Areas

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File Management

Directory

Hierarchical Structure of Computer’s Contents

Drives

Libraries

Folders

Subfolders

Files

Tree Structure

Root Directory

Top of Filing Structure

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File Management

File Explorer

Find, View, and Manage Contents of Computer

Naming Files

File Name

Extension

Indicates File Type

Up To 256 Characters

Including Path

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Utilities

Programs to Make Computing Easier

Types

Diagnostic

Antivirus

Backup

File Compression

Disk Cleanup

Disk Defragmenter

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Utilities

Types

Accessibility

Designed for Users with Special Needs