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Chap. 1

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Title: Chap. 1 & 2 - Overview, Apps Author: Jan Smith Last modified by: Jan Created Date: 6/15/2002 9:05:28 PM Document presentation format: On-screen Show (4:3) – PowerPoint PPT presentation

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Title: Chap. 1


1
Chap. 1 2 - Overview, Apps
  • Jan Smith
  • Computer Concepts and Applications

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2
Covering
  • Review of chapter 1 - Overview

3
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

4
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
5
Why is a computer powerful?
  • Speed billions of actions per second
  • Reliability failures usually human error
  • Storage keeps huge amounts of data

6
Categories of Computers
  • Personal or micro
  • Mini
  • Main Frame
  • Super

7
Categories of Computers
Personal micro
Portable Types Hand-held Palmtop Notebook Su
b-notebook Laptop Pen
Desktop
Tower
Workstations
8
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

9
Categories of Computers
  • Minicomputers
  • Originally for specific tasks, like
    engineering calculations
  • Main frame
  • Large systems for hundreds of users
  • Requires special environment

10
Categories of Computers
  • Supercomputers
  • Most powerful category
  • Used for weather forecasting, engineering
    design and testing, serious decryption
  • Cost several million dollars
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