Chapter 1

 Objectives :~

1) Explain why computer literacy is vital to success in today's world
2) Define the term, computer, and describe the relationship between data and information
3) Describe the five components of a computer
4) Discuss the advantages and disadvantages that users experience when 
    working with computers
5) Define the term network, and identify benefits of sharing resources on a
    network
6) Define the uses of the Internet and World Wide Web
7) Distinguish between system software and application software
8) Differentiate among types, sizes, and functions of computers in each 
     category
9) Describe the role of each element in an information system
10) Explain how home users, small office/home office users, mobile users, 
      power users,and enterprise users each interact with computers
11) Discuss how society uses computers in education, finance, government, 
       health care,science, publishing, travel, and manufacturing 

What is a Computer ?:~

A Computer is an electronic device that Collects Data ( input ) ~> Processes ~> Produces Information ( output ).

Components found in a Computer:~

 *Input Device
 *Output Device
 *System Unit
 *Storage Device
 *Communications Device

Advantages and Disadvantages of using Computers:~

Speed                                                                   1. Health Risks

Reliability                                                            2.Violation of Privacy

Consistency                                                          3.Public Safety

Storage                                                                  4.Impact on Labor Force

Communications                                                   5.Impact on Environment

Definition of Network:~

A network is a collection of computers and devices connected together, often 

wirelessly, via communications devices and transmission media.

Definition of Internet:~

The Internet is a worldwide collection of networks that connects millions of 
businesses, government agencies, educational institutions, and individuals.

People use the Internet for many reasons :~

 *Communications
*Research and information access
*Shopping
*Banking and investment
*Online trading
*Entertainment

Computer Software :~

A programmer develops software or writes the instructions that directs the computer
 to process the data into an information

Types of Computers :~
*Personal computers
*Mobile computers and mobile devices
*Game consoles
*Servers
*Mainframes
*Supercomputers
*Embedded computers

Elements in an information system :~
*Hardware
*Software
*Data
*People
*Procedures

Computer Application in a Society :~
*Education
*Finance 
*Government 
*Healthcare
*Science 
*Publishing 
*Travel
*Manufacturing