BMTS 242: Computer and Systems Lecture 5: Yousef Alharbi Website Computer Software System Software Basic Application Software Specialized Application Software

System Software

Computers and computer applications are ubiquitous in our lives so much so that we expect them to “be there when we need them”. We often give little thought to the processes and programs running behind the scenes to keep our computers functioning effectively. These kinds of programs and processes (i.e. operating systems, utility programs, device drivers, etc…) fall under the topic of system software and are covered in this chapter. Introduction 1-3 Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

Handles technical details Works with end users, application software, and computer hardware Four types of programs –Operating system –Utilities –Device drivers –Language translators System Software 1-4 Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

Manage computer resources Provide an interface between the users and computer Runs applications A collection of programs that handle technical tasks Every computer has an operating system Operating Systems 1-5 Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

Performs three types of functions – Manages computer resources Coordinate memory, processing storage, and printers Monitor system performance Provide security Start-up the computer – Provides user interface Character-based interface Graphical user interface (GUI) – Runs applications Multitasking Foreground & background applications Functions of an Operating System 1-6 Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

Booting Features in common with application software –Icons –Pointers –Windows –Menus –Dialog boxes –Help Features of an Operating System 1-7 Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

Hundreds of operating systems Three basic categories –Embedded operating systems – handheld –Network operating systems – linked computers –Stand-alone operating systems – desktop Categories of Operating Systems 1-8 Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

OS often called software environment or platform Operating systems commonly used by individuals –Windows – most widely usedWindows –Mac OS – powerful and easy to useMac OS –UNIX – network; originally designed for WebUNIX –LINUX – non proprietary; free from the WebLINUX More on Operating Systems 1-9 Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

The most popular microcomputer operating system – over 90 percent of the market Comes in a variety of different versions Windows 7 provides several improvements over Windows Vista Windows 1-10 Return Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

An operating system designed to run on Apple computers Not used as widely as Windows One of the most innovative operating systems Mac OS X is one of the latest versions Mac OS (Boot Camp) allows the running of both the Mac OS and Windows Mac OS 1-11 Return Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

UNIX operating system –Originally designed to run on minicomputers on a network –Used by powerful microcomputers LINUX is a version of UNIX –Not proprietary –Open source UNIX and LINUX 1-12 Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

Ability to support multiple operating systems on a single physical machine Virtualization software – Physical machine can be logically separated into separate and independent virtual computers called virtual machines –Host operating system –Guest operating system Virtualization 1-13 Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

Specialized programs to make computing easier Most essential utilities –Troubleshooting or diagnostic programs –Antivirus programs –Uninstall programs –Backup programs –File compression programs Utilities 1-14 Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

Backup and Restore Disk Cleanup Disk Defragmenter Windows Utilities 1-15 Accessing Windows Vista utilities: Click Start, Select All Programs, Select Accessories, Choose System Tools Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

Utility program included with many Windows versions Makes a copy of all files or selected files that have been saved on a disk Helps prevent against disk failure Backup and Restore 1-16 Return Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

Identifies and eliminates nonessential files Frees up valuable space and improves system performance Disk Cleanup 1-17 Return Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

Disk Defragmenter 1-18 Identifies and eliminates unnecessary fragments Rearranges files and unused disk space to optimize operations Speeds up file access Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

A group of several utility programs bundled for sale Buying the package is economical Popular suites –Norton System Works –McAfee Office –V Communications SystemSuite Utility Suites 1-19 Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

Specialized programs that allow communication between a device and the computer Loaded into memory each time a computer is started When a new device is added, new device drivers must be installed Device Drivers 1-20 Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

Virus Protection and Internet Security Internet Security Suite –Runs a number of programs –Continually monitors your computer VirusScan –Controls the frequency of searches for viruses –Quarantines or deletes infected files PrivacyService –Helps protect your privacy online –Block websites, cookies, and ads 1-21 Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

Thank You for Listening BMTS 242: Computer and Systems