TECHNOLOGY GUIDE TWO Computer Software. TECHNOLOGY GUIDE OUTLINE TG2.1 Significance of Software TG2.2 Systems Software TG2.3 Application Software TG2.4.

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TECHNOLOGY GUIDE TWO Computer Software

TECHNOLOGY GUIDE OUTLINE TG2.1 Significance of Software TG2.2 Systems Software TG2.3 Application Software TG2.4 Software Issues TG2.5 Programming Languages

LEARNING OBJECTIVES Differentiate between the two major types of software. Describe the general functions of the operating system. Describe the major types of application software.

LEARNING OBJECTIVES (continued) Describe the major software issues that organizations face today. Discuss the advantages and disadvantages of open-source software. Explain how software has evolved and consider trends for the future.

TG2.1 Significance of Software Computer program Stored program concept Documentation

Significance of Software (continued)

Types of Software System software Application software

TG2.2 Systems Software System control programs Operating system Apple OS X Leopard

Functions of the Operating System Multitasking/multiprogramming Multithreading Multiprocessing Virtual Memory Graphical user interface (GUI) Social interface

Example of Social Interface Using an Avatar Avatar

System Support Programs System support programs System utilities System performance monitors System security monitors

TG2.3 Application Software Proprietary application software Contract software Off-the-shelf application software Package

TG2.4 Software Issues Software defects Software evaluation and selection Software licensing Open systems Open source software Software-as-a-Service

TG2.5 Programming Languages First-generation language or Machine Language Second-generation language or Assembly language Third-generation language or Procedural language Fourth-generation language or Non- procedural language Visual programming languages

Object-Oriented Languages Object-Oriented Languages: Programming language that encapsulate a small amount of data with instructions about what to do with data. Methods Object Encapsulation Reusability feature

Hypertext Markup Language and Extensible Markup Language Hypertext Hyperlinks Hypertext document Hypertext markup language (HTML) Extensible markup language (XML)

Comparison of HTML and XML