Chap. 1

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Chap. 1 2 - Overview, Apps

• Jan Smith
• Computer Concepts and Applications

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Covering

• Review of chapter 1 - Overview

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Chapter 1 - Overview

• A computer is an electronic device that
• a. operates under the control of memory
  unit
• b. accepts data
• c. processes data
• d. produces output
• e. stores the results for use later

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Chapter 1 - Overview

• b. accepts data
• c. processes data
• d. produces output
• e. stores the results for use later

Information Processing Cycle
Input Processing Output Storage
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Why is a computer powerful?

• Speed billions of actions per second
• Reliability failures usually human error
• Storage keeps huge amounts of data

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Categories of Computers

• Personal or micro
• Mini
• Main Frame
• Super

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Categories of Computers
Personal micro
Portable Types Hand-held Palmtop Notebook Su
b-notebook Laptop Pen
Desktop
Tower
Workstations
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Categories of Computers

• Servers
• (how its used more than what it is)
• Designed to support a computer network
• More powerful
• Larger memory
• Larger storage capacity
• High speed communications

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Categories of Computers

• Minicomputers
• Originally for specific tasks, like
  engineering calculations
• Main frame
• Large systems for hundreds of users
• Requires special environment

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Categories of Computers

• Supercomputers
• Most powerful category
• Used for weather forecasting, engineering
  design and testing, serious decryption
• Cost several million dollars