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Technology Guide 2 Software

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Presentation on theme: "Technology Guide 2 Software"— Presentation transcript:

1 Technology Guide 2 Software

2 Types of Software Application Software Systems Software
A set of computer instructions, written in a programming language Systems Software An intermediary between computer hardware and application programs and knowledgeable users may also directly manipulate

3 Types of Application Software
Spearsheets software Data management systems (DBMSs) Word processing Desktop publishing Graphics : presentation graphics; analysis graphics; and engineering graphics Multimedia Communications software Software suites Workgroup software Enterprisewide integrated software

4 Systems Software System Control Programs Operating systems
job management resource management data management Graphic user interface operating systems Processing tasks multiprogramming and multiprocessing time-sharing Virtual memory virtual machine operating system

5 Systems Support Programs
System utility programs accomplish common tasks System performance monitors monitor computer system performance and produce reports containing detailed statistics concerning the use of system resources System security monitors monitor the use of a computer system to protect it and its resources from unauthorized use, fraud, or destruction

6 Systems Support Programs
System development programs translate user computer programs written in source code into object or machine code

7 Programming Languages
Evolution of Programming Languages Machine language : 0-1 long; difficult programming Assembly language : assemble repetitive instructions, shorter code Procedural language : include commands, shorter code Non-procedural languages : application generators; commands specify results Intelligent languages : natural language processing Generations 1st 2nd 3rd 4th 5th Progress

8 High-Level Languages Procedural Languages (3rd generation)
require the programmer to specify exactly how the computer will accomplish a task Nonprocedural Languages (4th generation) allows the user to specify the desired results without having to specify the detailed procedures needed for achieving the results Natural Languages Programming Language –NLP (5th generation)

9 New Programming Languages
Object-oriented Programming Languages Object – models “things” in the real world Class – a template or general framework that defines the methods and attributes to be included in a particular type of object Message passing – allows objects to interact with each other Encapsulation – inaccessibility of data in an object Inheritance – define a class of objects as a special case of a more general class Polymorphism – send the same message to several different receivers (objects)

10 New Programming Languages
Visual Programming Languages used within a graphical environment allows developers to create applications by manipulating graphical images directly examples: Visual Basic, DELPHI, CA Visual, Power Objects, and Visual C ++

11 Internet-Oriented Languages
Hypertext Markup Language (HTML) standard language the Web uses for creating and recognizing hypermedia hypermedia hypertext : an approach to data management in which data area stored in a network of nodes connected by links (called hyperlinks) uniform resource locators (URLs) : represent hypermedia links and links to network service within HTML dynamic HTML : next step beyond HTML

12 Internet-Oriented Languages
eXtensible Markup Language (XML) optimized for document delivery across the Net Java develop applications that work across the Internet JavaBeans platform-neutral, component architecture for Java ActiveX a set of technologies from Microsoft that combines different programming languages into a single, integrated Web site

13 Internet-Oriented Languages
Virtual Reality Modeling Language (VRML) a file format for describing three-dimensional interactive worlds and objects represent static and animated objects have hyperlinks to other media such as sound, video, and image Web Browsers major software tool for accessing and working with the web display various media and active the hyperlinks Major competing browsers : Netscape Navigator and Communicator and Microsoft’s Explorer

14 Computer-Aided Software Engineering (CASE)
It is a tool or programmers, systems analysts, business analysts, and systems developers to help automate software development and at he same time improve software quality. It is a combination of software tools and structured software development methods.

15 Categories of CASE Tools
Upper CASE (U-CASE) focus primarily on the design aspects of systems development Lower CASE (L-CASE) helps with programming s and related activities Integrated CASE (I-CASE) incorporates both U-CASE and L-CASE functionality and provide support for many tasks throughout the SDLC

16 Advantages of CASE Tools
Improves productivity Results in better interaction among users and information systems professionals Makes easier to create prototypes Makers easier to make system design changes as circumstances change

17 Software Issues and Trends
Software Licensing Vendors can copyright software Guidelines : when information systems (IS) managers cannot find proof of purchase for software, they should get rid of the software or purchase new licenses

18 Software Issues and Trends
Software Upgrades may offer valuable enhancements may contain bugs Shareware user is expected to pay the author a modest amount for the privilege of using it Freeware software that is fee

19 IT for Management Prof. Efraim Turban Copyright  2001 John Wiley & Sons, Incorporated. All rights reserved. Reproduction or translation of this work beyond that permitted in Section 117 of the 1976 United States Copyright Act without the express written permission of the copyright owner in unlawful. Request for further information should be addressed to the Permissions Department, John Wiley & Son, Inc. Adopters of the textbook are granted permission to make back-up copies for his/her own use only, to make copies for distribution to student of the course the textbook is used in, and to modify this material to best suit their instructional needs. Under no circumstances can copies be made for resale. The publisher assumes no responsibility for errors, omissions, or damages, caused by the use of these programs or from the use of the information contained herein. 6-19

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