Discovering Computer

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Discovering Computers


Chapter 1 : Introduction to Computers

Chapter 1 Objectives
Recognize the importance of computer literacy Define the term, computer Describe the categories of computers Identify the components of a computer Discuss the advantages and disadvantages of using computers Recognize the purpose of a network Discuss the uses of the Internet and World Wide Web Discuss various computer applications in society Identify the elements of an information system Describe the various types of computer users Distinguish between system software and application software

Next

A World of Computers
What is computer literacy (digital literacy)?
 Current knowledge and understanding of computers and their uses  Computers are everywhere

Next

What Is a Computer?
How is a computer defined?
 Electronic device operating under the control of instructions stored in its own memory Processes data into information
Conveys meaning and is useful to people

Accepts data
Collection of unprocessed items

Produces and stores results

Next

What Is a Computer?
What is the information processing cycle?

 




Input Process Output Storage Communication

Next

The Components of a Computer
What is an input device?


Hardware used to enter data and instructions

Next

The Components of a Computer
What is an output device?


Hardware that conveys information to one or more people

Next

The Components of a Computer
What is the system unit?
Case that contains the electronic components of the computer that are used to process data 

Next

The Components of a Computer
What are two main components on the motherboard?
Processor
Also called a Central Processing Unit (CPU) The electronic component that interprets and carries out the basic instructions that operate the computer

Memory
Consists of electronic components that store instructions waiting to be executed and data needed by those instructions Next

The Components of a Computer
What is storage?
 Holds data, instructions, and information for future use Storage media
Physical material on which data, instructions, and information are stored

Storage device
Records and retrieves items to and from storage media

Next

The Components of a Computer
What is a USB flash drive?

Portable storage device Small and lightweight enough to be transported on a keychain or in a pocket The average USB flash drive can hold about 2 billion characters

Next

The Components of a Computer
What is a hard disk?
 Provides greater storage capacity than a USB flash drive  Most are housed inside the system unit

Next

The Components of a Computer
What is a compact disc?
 Flat, round, portable metal disc
  CD DVD

Next

The Components of a Computer
What is a communications device?
Hardware component that enables a computer to send and receive data, instructions, and information

Occurs over cables, telephone lines, cellular radio networks, satellites, and other transmission media

Next

Advantages and Disadvantages of Using Computers
What are the advantages of using computers?

Speed

Reliability

Consistency

Storage

Communications

Next

Advantages and Disadvantages of Using Computers
What are the disadvantages of using computers?

Violation of Privacy

Public Safety

Impact on Labor Force

Health Risks

Impact on Environment

Next

Networks and the Internet
What is a network?
 Collection of computers and devices connected together, often wirelessly Used to share
Resources Hardware devices

Software programs
Data Information

Saves time and money
Next

Networks and the Internet
What is a server?
 A server controls access to resources on a network  Clients, or workstations, request resources from the server

Next

Networks and the Internet
What is the Internet?
 Worldwide collection of networks that connects millions of...
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