1. COMP 6005 An Introduction To Computing Session Three: Computer Software Introduction

2. COMP 6005 An Introduction to Programming - Session Two: Computer Software - Introduction2 Session Objectives Describe different types of computer software –Business –Graphics and multimedia –Home/personal/educational –Database management software Describe the function of a utility program Describe the software requirements for an e- commerce/e-business initiative

3. COMP 6005 An Introduction to Programming - Session Two: Computer Software - Introduction3 Session Objectives Compare and contrast different types of operating systems Understand the importance of the web to computing Distinguish between different types of web applications and tools Distinguish between a computer program and an algorithm

4. COMP 6005 An Introduction to Programming - Session Two: Computer Software - Introduction4 Session Objectives Compare and contrast proprietary and open source software Different types of licenses –Volume –GNU –Number of users versus Number of computers

5. COMP 6005 An Introduction to Programming - Session Two: Computer Software - Introduction5 Definition of Software Computer instructions or data that can be stored electronically Used to operate computers and related devices Tells the computer what to do and how to do it

6. COMP 6005 An Introduction to Programming - Session Two: Computer Software - Introduction6 Types of Software Application – programs that do real work for users System – any program that supports application software; includes operating system Middleware - programming that mediates between application and system software or between two different kinds of application software Utility – small useful program with limited capability

7. COMP 6005 An Introduction to Programming - Session Two: Computer Software - Introduction7 Layers Of A Computer System

8. COMP 6005 An Introduction to Programming - Session Two: Computer Software - Introduction8 Application Software Program designed to perform a specific function directly for the user or, in some cases, for another application program Include: browsers, Web processors, database programs, spreadsheets, development tools, drawing, paint, image editing programs, and communication programs Uses the services of the computer's operating system and other supporting applications through a defined application program interface (API)

9. COMP 6005 An Introduction to Programming - Session Two: Computer Software - Introduction9 System Software Programs that control or maintain the operations of the computer and its devices Serves as interface between the user, application software, and the computer hardware Two types: –Operating system –Utility programs

10. COMP 6005 An Introduction to Programming - Session Two: Computer Software - Introduction10 Operating System Set of programs that coordinates all activities among computer hardware devices Contains instructions that allow users to run application software Examples: Windows XP, Mac OS X

11. COMP 6005 An Introduction to Programming - Session Two: Computer Software - Introduction11 Utility Program Allows users to perform maintenance- type tasks, usually related to managing the computer, devices or programs Example: a program that examines a floppy disk or hard disk to determine if it contains any physical flaws such as scratches

12. COMP 6005 An Introduction to Programming - Session Two: Computer Software - Introduction12 Discussion Issue 1-3, pg 17 Issue 3-1, pg 136

13. COMP 6005 An Introduction to Programming - Session Two: Computer Software - Introduction13 Links Reference –Discovering Computers 2005 by Shelly, Cashman and Vermaat –http://www.whatis.comhttp://www.whatis.com –http://www.webopedia.comhttp://www.webopedia.com