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Computers Are Your Future
© 2006 Prentice-Hall, Inc.
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Computers Are Your Future Chapter 1
Computers Are Your Future
Chapter 1Lecture 1Week 1
Computers and You
Slide 2
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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
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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
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Computers Are Your Future Chapter 1Understanding the Computer: Basic Definitions
• Computer – A machine that performs the four basic operations of the information-processing cycle:
Slide 5
input processing storageoutput
basic operations of the information-processing cycle:
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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
Slide 6
Hardware Software
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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
Slide 7
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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
Slide 8
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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
Slide 9
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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
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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)
Slide 11
DATA IN INFORMATION OUT
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Computers Are Your Future Chapter 1Processing Devices
© 2006 Prentice-Hall, Inc. Slide 12
Motherboard
Central Processing Unit – CPU
Random Access Memory– RAM
Expansion Card
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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
Slide 13
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Computers Are Your Future Chapter 1Output Devices
© 2006 Prentice-Hall, Inc. Slide 14
MonitorPrinter
Speakers
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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
Slide 15
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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
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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)
Slide 17