Computers Are Your Future

© 2006 Prentice-Hall, Inc.

Computers Are Your Future Chapter 1

Computers Are Your Future

Chapter 1Lecture 1Week 1

Computers and You

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Computers Are Your Future Chapter 1

What You Will Learn . . .What You Will Learn . . .

• Define the word computer and name the four basic operations

• Describe the main components of a computer– Hardware– Software

• Provide examples of hardware devices• Explore the information-processing cycle

Slide 3

Computers Are Your Future Chapter 1

Computers & You

• Workers with computer and Internet skills tend to make more money and have more satisfying careers than workers without such skills Slide 4

Computers Are Your Future Chapter 1Understanding the Computer: Basic Definitions

• Computer – A machine that performs the four basic operations of the information-processing cycle:

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input processing storageoutput

basic operations of the information-processing cycle:

Computers Are Your Future Chapter 1

Understanding the Computer: Basic Definitions

• Computer system – A collection of related components that are designed to work together– A system includes hardware and software

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Hardware Software

Computers Are Your Future Chapter 1

Understanding the Computer: Basic Definitions

• Program – A list of instructions that tell the computer how to perform the four basic operations to accomplish a task

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Computers Are Your Future Chapter 1

Understanding the Computer: Basic Definitions

• Software – All the programs that give the computer its instructions– Two categories of software:

System software Application software

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Computers Are Your Future Chapter 11-Input: Getting Data into the Computer

• Data – Unorganized raw materials made up of words, numbers, images, or sounds

• The first operation: input– Input devices enable the user to enter data into

the computer– The computer accepts data

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Computers Are Your Future Chapter 1

Input Devices

© 2006 Prentice-Hall, Inc. Slide 10

Keyboard Mouse – pointing device

Microphone –speech-recognition

Digital Cameras

Computers Are Your Future Chapter 12- Processing: Transforming Data into

Information

• The second operation: processing– Computers transform data into information– Processing circuitry:

• Central processing unit (CPU)• Random access memory (RAM)

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DATA IN INFORMATION OUT

Computers Are Your Future Chapter 1Processing Devices

© 2006 Prentice-Hall, Inc. Slide 12

Motherboard

Central Processing Unit – CPU

Random Access Memory– RAM

Expansion Card

Computers Are Your Future Chapter 1

3- Output: Displaying Information

• The third operation: output– The computer shows the results of the processing

operation in a way people can understand– Output devices show the results of processing

operations

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Computers Are Your Future Chapter 1Output Devices

© 2006 Prentice-Hall, Inc. Slide 14

MonitorPrinter

Speakers

Computers Are Your Future Chapter 1

4-Storage: Holding Programs and Datafor Future Use

• The fourth operation: storage– The computer saves the data or output so that it can

be used again later– Storage devices hold all programs and data that the

computer uses

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Computers Are Your Future Chapter 1Storage Devices

© 2006 Prentice-Hall, Inc. Slide 16

Hard Drive

Floppy Disk Drive

Zip Drive

CD/DVD Drive

Jaz Drive

Tape Drive

Micro Drive

Computers Are Your Future Chapter 1

Chapter 1 Summary

• A computer is a machine that performs the operations of input, processing, output, and storage

• A computer system is a collection of related components

• The information processing cycle consists of the input (keyboard, mouse), processing (microprocessor), output (printer, monitor), and storage operations (hard disk, floppy disk)

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